Ancient Greek Coin Identification: A Practical Guide

About 17.2 grams of Attic silver — that is what you hold when you pick up an Athenian tetradrachm. The weight is your first identification tool. It tells you something immediate: this coin was made to a standard, the Attic drachm system, and it speaks the same monetary language as coins struck in Macedonia, Sicily, and Anatolia for centuries. Thucydides records that Pericles cited 6,000 talents of coined silver on the Acropolis when enumerating Athens’ war reserves at the start of the Peloponnesian War in 431 BC — a reserve built predominantly through Delian League tribute, much of it arriving in Athenian owls.⁸

But identifying that coin, and the many other city-states and dynasties that struck beside Athens, follows different logic than Roman coin identification. There are no emperor portraits in the classical period. The standard references — BMC, SNG, Price, Svoronos — are less familiar to most collectors than RIC. And the legends are in Ancient Greek, not Latin.

This guide covers four approaches that apply across the full sweep of Greek numismatics, from 5th-century Athens to the posthumous Alexander tetradrachms still being struck in the 1st century BC: denomination, deity iconography, legend reading, and catalog matching. The NumisLens catalog covers Greek and Hellenistic series through BMC, Price (20,000+ Alexander tetradrachm types), Seleucid Coins Online (2,500+ types), and Ptolemaic Coins Online (990+ types). Use the Visual Wizard to search by denomination, metal, and reverse type.

Start With the Denomination

About 22–28 millimeters in diameter. Approximately 17 grams of silver. If you have a coin matching those measurements, you almost certainly have a tetradrachm — the dominant large denomination of the Greek world and the starting point for most identification work. Denomination is the first filter in Greek coin identification because the system was built around standardized weights that are still measurable today.

Several weight standards structured Greek silver coinage; most collectors will encounter three with regularity. The Attic (Athenian) standard defined the drachm at approximately 4.3 grams and built the full denomination hierarchy on that unit. It spread with Athenian commercial dominance in the 5th century BC and was adopted empire-wide by Alexander the Great, making it the dominant standard in Hellenistic numismatics. The Corinthian standard weighed its stater at approximately 8.6 grams — equivalent in weight to the Attic didrachm — with its own distinct iconographic tradition distributed through Corinthian colonies in the western Mediterranean and Adriatic. The Aeginetan standard is the third you will commonly encounter: it defined the drachm at approximately 6.1 grams, making an Aeginetan tetradrachm roughly 24.4 grams. States including Aegina, Boeotia, and many Peloponnesian cities struck on this heavier standard. A coin that does not match the weights in the Attic table below may well be Aeginetan rather than poorly preserved or incorrectly attributed.

Denomination	Weight (Attic standard)	Typical diameter	Notes
Decadrachm	~43g	36–40mm	Rare; ceremonial or commemorative issues
Tetradrachm	~17.2g	22–28mm	Workhorse of Greek trade; most common denomination in the market
Didrachm	~8.6g	18–22mm	Common in early periods; equivalent to Corinthian stater in weight
Drachm	~4.3g	14–18mm	Everyday commerce; widely struck across the Greek world
Hemidrachm	~2.15g	10–14mm	Fractional; half a drachm
Obol	~0.72g	8–11mm	One-sixth of a drachm; daily retail denomination
Stater (Corinthian)	~8.6g	18–22mm	Pegasus obverse; widely circulated via Corinthian trade networks
Stater (Macedonian gold)	~8.6g	17–20mm	Philip II and Alexander the Great gold issues; Attic gold standard

The Athenian obol — one-sixth of a drachm, approximately 0.72 grams, the size of a small button — was the fractional denomination for daily transactions. Finding a tiny silver piece of 8–10mm is a strong signal you have an obol or hemiobol. These are easy to overlook in dealer stock but plentiful in the market.

If you are examining a Greek coin and the description gives no weight, look at the diameter. A silver coin at 22–28mm is a tetradrachm; at 14–18mm, a drachm; at 8–11mm, an obol. Denomination narrows the field of possible catalog matches before you examine a single letter of the legend.

Identify the Issuing City-State From the Imagery

The most distinctive feature of classical Greek coinage — absent entirely from Roman coins — is the city-state as issuer, expressed not through a text declaration but through the patron deity’s imagery. Greek city-states struck coins in the name of their tutelary god or goddess. The imagery does not merely decorate the coin: it identifies the mint more reliably than any legend, because the deity’s emblem was the city’s most durable public signal.

The concept linking this system together is the ethnic — the city’s name in the Greek genitive case, establishing that the coin speaks for and belongs to that city’s community. Ethnics are almost always abbreviated on the coin itself: ΑΘΕ stands for ΑΘΕΝΑΙΩΝ (“of the Athenians”); ΣΥΡ for ΣΥΡΑΚΟΣΙΩΝ (“of the Syracusans”); ΚΟΡΙ for ΚΟΡΙΝΘΙΩΝ (“of the Corinthians”). Learning 15–20 of these abbreviations covers the majority of classical Greek coinage encountered in the market.

Obverse / Reverse imagery	Likely mint	Notes
Helmeted Athena / Owl, olive branch, ΑΘΕ	Athens	“Athenian owl” — most recognized Greek coin; struck 5th–1st c. BC
Bee (obverse) / Stag, ΕΦΕ	Ephesus (Ionia)	The bee is the primary obverse emblem of the Ephesian Artemis cult; stag on reverse; some 4th c. types show Apollo obverse with bee reverse
Head of Arethusa / Quadriga	Syracuse (Sicily)	Arethusa, nymph of the city’s spring; finest Greek engraving; signed dies by Kimon and Euainetos
Pegasus / Helmeted Athena head	Corinth	“Pegasoi” — widely circulated across Corinthian colonies; obverse: flying Pegasus
Herakles in lion-skin / Seated Zeus, ΑΛΕΞΑΝΔΡΟΥ	Macedonia (Alexander tetradrachms)	Lifetime and posthumous issues; posthumous types are the most common Hellenistic silver in the market
Portrait in diadem / Eagle on thunderbolt	Ptolemaic Egypt	Eagle on thunderbolt is the defining Ptolemaic reverse; used by all rulers from Ptolemy I onward
Bearded ruler in diadem / Apollo on omphalos	Seleucid Empire	Canonical Seleucid type from Antiochus I onward; Apollo holds an arrow

One practical rule: the reverse type is generally more diagnostic than the obverse for city-state identification. The obverse typically shows a deity head that can be shared across several cities — helmeted female heads appear on coins from Athens, Corinth, and many other mints. The reverse shows the specific emblem that distinguishes the issuer: the owl for Athens, the crab for Akragas, the bee for Ephesus, the bull for Thurioi. Examine the reverse first.

Hellenistic Rulers — Identification by Portrait

The Hellenistic period — beginning with Alexander the Great’s death in 323 BC and ending conventionally with the Roman annexation of Ptolemaic Egypt in 30 BC — introduced something that classical Greek coinage had almost entirely avoided: the ruler’s own likeness. This makes Hellenistic coins significantly easier to identify than classical Greek coins, because you have a face to work with. The identification logic is closer to Roman imperial numismatics than to the city-state system.

Alexander the Great himself did not place his own portrait on his coinage. His silver tetradrachms bear the head of Herakles — divine ancestor of the Macedonian royal house — wearing the lion-skin headdress on the obverse, and a seated Zeus holding eagle and scepter on the reverse, with the legend ΑΛΕΞΑΝΔΡΟΥ (“of Alexander”).⁹ These types were struck at more than thirty mints during his reign and continued to be produced for over two centuries after his death in Babylon in 323 BC. The posthumous Alexander tetradrachm is the most commonly encountered Hellenistic coin on the market today; identifying the specific mint requires Price’s 1991 catalogue, which assigns more than 20,000 types across more than thirty mints.¹

Alexander’s successors placed their own portraits on coins with considerably fewer reservations:

Ptolemy I Soter (king from 305 BC) was among the first of the Diadochi to place his own portrait on coins consistently. His tetradrachms show him in a diadem, with an eagle standing on a thunderbolt on the reverse and the legend ΠΤΟΛΕΜΑΙΟΥ ΒΑΣΙΛΕΩΣ (“of Ptolemy the king”). The eagle on thunderbolt became the defining Ptolemaic reverse and dominated the dynasty’s silver output for most of the Ptolemaic period.

Lysimachus of Thrace (died 281 BC) struck one of the most celebrated Hellenistic tetradrachms: not his own portrait, but the deified Alexander, shown with the ram’s horn of Zeus Ammon added to his head — the divine attribute awarded by the oracle at Siwa in 331 BC. The reverse shows Athena seated with Nike. By depicting the deified Alexander rather than himself, Lysimachus claimed Macedonian legitimacy without explicit self-promotion. These are among the most beautifully struck Hellenistic coins and command premium prices in VF: $500–2,000 at major auction houses, with choice examples from the best workshops pushing considerably higher.

Seleucus I Nicator, founder of the Seleucid empire, struck portrait coins on several types; his most distinctive issues show a bull-horned helmet — a reference to the divine bull associated with the Seleucid line. Other types show him in a plain helmet or in diadem. The anchor, introduced as the Seleucid dynastic symbol on early bronze coinage, appears as a control mark or primary type on coins throughout the dynasty’s history and immediately identifies a coin as Seleucid when present.

Antiochus I and II of the Seleucid dynasty established the canonical type that persisted through much of the series: a bearded ruler in diadem on the obverse, with Apollo seated on the omphalos — the sacred navel-stone of Delphi — holding an arrow on the reverse. Once you recognise this type, Seleucid silver identification becomes a matter of reading the legend to determine the reign, then consulting Houghton and Lorber’s Seleucid Coins to resolve the mint.⁴

Reading the Legend

Greek coin legends are written in Ancient Greek script — not Latin — and follow conventions that take some practice but present no fundamental difficulty. The direction is generally left-to-right; early archaic coins occasionally show retrograde legends reading right-to-left, but by the classical period (5th century BC onward) this is exceptional. Arrangement is typically radial, with letters curving around the coin’s edge to follow the flan’s circumference rather than running horizontally across the field.

Four categories of legend appear on Greek coins, each with a specific identification role:

Ethnic legends give the city’s name in the genitive plural, establishing that the community issued the coin: ΑΘΕΝΑΙΩΝ (of the Athenians), ΚΟΡΙΝΘΙΩΝ (of the Corinthians), ΣΥΡΑΚΟΣΙΩΝ (of the Syracusans). These are almost always abbreviated on the coin: ΑΘΕ, ΚΟΡΙ, ΣΥΡ. The numismatic term “ethnic” is standard in Greek coin literature and signals to dealers exactly which part of the legend you are discussing.

Ruler name legends appear in the Hellenistic period in the genitive singular: ΑΛΕΞΑΝΔΡΟΥ (of Alexander), ΠΤΟΛΕΜΑΙΟΥ (of Ptolemy), ΑΝΤΙΟΧΟΥ (of Antiochus), ΣΕΛΕΥΚΟΥ (of Seleucus). The genitive construction is consistent: the coin speaks for, and belongs to, the named authority.

Title legends indicate royal status in Hellenistic coinage: ΒΑΣΙΛΕΩΣ (“of the king”) typically follows the ruler’s name, giving ΒΑΣΙΛΕΩΣ ΠΤΟΛΕΜΑΙΟΥ or ΒΑΣΙΛΕΩΣ ΑΝΤΙΟΧΟΥ. The appearance of ΒΑΣΙΛΕΩΣ marks the formal shift from the city-state to the Hellenistic kingdom as issuing authority — a shift that occurred in 306–305 BC when the leading generals of the Diadochi began assuming royal titles, starting with Antigonus Monophthalmos.

Magistrate marks and control symbols — small letters, monograms, or symbols in the coin’s field — identify the mint official responsible for a specific issue. They are indispensable for precise attribution within a long series. For posthumous Alexander tetradrachms, it is the combination of primary reverse type, magistrate symbols in the field, and die style that allows Price to assign a specific coin to a specific mint — not any single element alone.

A practical identification tip: identify the first one or two letters of the legend and cross-reference against known city and ruler names. ΑΘΕ or ΑΘΕΝ points to Athens before you read further. ΑΛΕ or ΑΛΕΞ points to Alexander. ΠΤΟΛ points to a Ptolemaic ruler. This first-letter matching narrows the field before you have read the full legend. The NumisLens catalog search accepts Greek legend text — enter any characters you can read from the coin and search the catalog directly.

Which Catalog References to Use

Roman coinage has a dominant framework: RIC, organised by emperor and mint, covering the full Imperial period across multiple volumes. Whatever its inconsistencies between volumes and editors, collectors at least know to start there. Greek coinage has no equivalent single framework. Different series require entirely different references, and knowing which catalog applies to a specific coin is itself part of the expertise.

Reference	Coverage	Notes
BMC	Classical Greek city-states by region	British Museum Catalogue; multi-volume, 1873–1927; older but still standard for many series
SNG	Regional museum collections	Sylloge Nummorum Graecorum; each volume covers a specific institution’s holdings; valuable for die comparison
HN	Comprehensive Greek census	Head’s Historia Numorum (1911); the classic single-volume survey; cite as HN
HGC	Greek civic and Hellenistic coinage	Hoover’s Handbook of Greek Coinage (2009–); modern, consistent numbering; best general cross-reference
Price	Alexander the Great tetradrachms	Price (1991); 20,000+ types across 30+ mints; essential for posthumous Alexander attribution
SC	Seleucid dynasty	Houghton & Lorber, Seleucid Coins (2002, 2008); standard modern reference for the series
Lorber	Ptolemaic Egypt	Lorber (2018), Coins of the Ptolemaic Empire; replaces older Svoronos as the current standard
Sear Greek	Greek coinage cross-reference	David Sear, Greek Coins and Their Values (1978–79); accessible starting point; not the primary scholarly catalogue

A few practical notes on how these references are used:

BMC was published across multiple volumes from 1873 to 1927 and covers classical city-state coinage by geographic region — one volume for Attica, another for Corinthia and Acarnania, another for Macedon, and so on. Some attributions have been revised by subsequent scholarship, but BMC remains the standard citation for many types that have not been re-catalogued in more recent specialist works.⁷

Price (1991) ¹ is the essential reference for any Alexander tetradrachm, lifetime or posthumous. Without Price, a posthumous Alexander tetradrachm can only be described in general terms; with it, a precise mint attribution is possible through the combination of primary type, control marks, and die style. The NumisLens catalog covers this series through the PELLA database (20,000+ Price-referenced types).

HGC (Hoover’s Handbook of Greek Coinage)³ is the most practically useful modern cross-reference for new collectors. It covers a wider range of issues than the older BMC volumes with consistent modern numbering and is a sensible starting point before moving to the series-specific specialist references.

The NumisLens catalog also covers Seleucid coins via Seleucid Coins Online (SCO, 2,500+ types referenced to SC) and Ptolemaic coins via Ptolemaic Coins Online (PCO, 990+ types referenced to Lorber). A full list of all supported reference systems is at the data sources page.

Using AI and Digital Tools for Greek Coin Identification

Consumer coin identification apps — CoinSnap, Coinoscope, and their equivalents — fail on ancient Greek coins as a matter of design, not performance. These apps are trained on modern national coinage: standardised 20th and 21st century issues on uniform blanks. Ancient Greek coins differ in every dimension: irregular hand-struck flans, engraving styles that vary by workshop and period, surface conditions developed over 2,000+ years of burial, and an iconographic system that no consumer training dataset addresses. Presenting an ancient Greek coin to a consumer coin app typically returns a modern coin with superficially similar imagery, or no result.

What actually works:

Structured visual catalog search is the most reliable approach. Begin with the physical properties you can determine without reference: metal, approximate weight (and therefore denomination), and the most distinctive reverse imagery. Enter these parameters into a search against documented types.

The NumisLens Visual Wizard is built for exactly this workflow. For a Greek coin, the four-step sequence is: (1) select metal — silver, bronze, or gold; (2) select denomination — tetradrachm, drachm, stater, obol, and other denominations are all supported; (3) select the issuing authority — Athenian, Macedonian, Ptolemaic, Seleucid, or the specific city-state; (4) identify the reverse type from the presented imagery. This matches the physical coin against the catalog in the same sequence that an experienced dealer would use.

Expert communities remain invaluable for obscure types and unusual die varieties. Forum Ancient Coins and Reddit’s r/AncientCoins have genuine specialist expertise; posts with clear photographs of both sides, alongside weight and diameter, typically receive attribution within 24–48 hours.

Direct catalog text search by any characters you can read from the coin — a legend fragment, an abbreviated ethnic, a partial ruler name — often produces a match even with incomplete information.

The Most Commonly Encountered Ancient Greek Coins

Six types account for a large share of the Greek and Hellenistic coins that appear at auction, in dealer stock, and in new collectors’ first purchases. Each represents a distinct category of Greek coinage.

1. Athenian Owl Tetradrachm

Athens, struck continuously from the late 6th century BC through the 1st century BC. The obverse shows Athena’s helmeted head; the reverse shows an owl with olive branch and crescent, with the ethnic ΑΘΕ. Early “archaic” and “transitional” style pieces (pre-450 BC) command significant premiums. The standard “classical” style owls of the 5th and 4th centuries BC are the most encountered type in the market; in VF condition with good centering and original surfaces, expect $700–2,000. “New Style” Athenian owls of the Hellenistic period (c. 165–42 BC) are less expensive at $200–600 in VF. Reference: BMC Attica.

2. Posthumous Alexander the Great Tetradrachm

The most common Hellenistic coin by volume: struck at more than thirty mints for over two centuries after Alexander’s death in 323 BC. Obverse: head of Herakles in lion-skin. Reverse: seated Zeus, legend ΑΛΕΞΑΝΔΡΟΥ. Common mint attributions (Amphipolis, Babylon, and major eastern mints) in VF typically sell for $100–350. Attributions to rarer mints or unusually sharp examples push considerably higher. Reference: Price.¹

3. Corinthian Stater

Struck at Corinth and its colonies from the late 6th century BC through the mid-3rd century BC. Obverse: Pegasus flying. Reverse: helmeted Athena head, with a letter or symbol in the field identifying the specific issue. “Pegasoi” (as collectors call them) were widely circulated throughout Corinthian trade networks and are plentiful in the market. Common issues in VF: $200–600, depending on the specific issue and the sharpness of the Athena portrait. Reference: BMC Corinthia.

4. Syracusan Dekadrachm

Among the rarest and most artistically ambitious coins of antiquity. The famous signed dekadrachms of Kimon and Euainetos (c. 405–395 BC) show the head of Arethusa — the nymph of Syracuse’s freshwater spring — surrounded by dolphins on the obverse, and a quadriga with a Nike crowning the charioteer on the reverse. These are prestige auction pieces; genuine examples in any condition exceed $20,000, and the finest pieces have sold for $100,000+ at major houses. Less expensive Syracusan silver tetradrachms of earlier and later periods provide more accessible entry into the series. Reference: BMC Sicily.

5. Ptolemaic Eagle Tetradrachm

The standard Ptolemaic large silver denomination: portrait of the current ruler in diadem on the obverse; eagle standing on a thunderbolt on the reverse; legend ΒΑΣΙΛΕΩΣ ΠΤΟΛΕΜΑΙΟΥ (and variants for later rulers). The eagle type dominated Ptolemaic silver production through most of the dynasty’s history. Common issues of Ptolemy III, IV, and V in VF: $200–500. Reference: Lorber; PCO database in NumisLens.⁵

6. Seleucid Antiochus Tetradrachm

The canonical Seleucid silver type from Antiochus I onward: bearded ruler in diadem on the obverse; Apollo seated on the omphalos holding an arrow on the reverse, with an anchor symbol. The Seleucid empire struck at a wide geographic spread of mints from Antioch-on-the-Orontes to the far eastern satrapies. Common issues of Antiochus III, IV, and VII in VF: $200–600, depending on the specific mint and reign. Reference: SC (Houghton & Lorber); SCO database in NumisLens.⁴

Authentication — Is My Greek Coin Real?

Ancient Greek coins are among the most heavily counterfeited in all of numismatics. The most targeted types — Athenian owl tetradrachms, posthumous Alexander tetradrachms, and Syracusan dekadrachms — are produced as fakes in quantities that rival genuine examples in some market segments. No single authentication criterion is definitive; the assessment requires evaluating several factors together.

Weight and physical regularity provide the first check. Genuine ancient coins were struck by hand on blanks prepared by casting and hand-cutting, not machine rolling. Weight variation within a genuine series is real: standard Attic tetradrachms vary by ±0.3–0.5 grams across a long series. Cast fakes — made by pressing impressions from genuine coins into a mold — tend toward uniform weight and show characteristic signs of the casting process: a seam line around the edge (often filed but traceable), gas porosity on the surface, and slightly softened details compared to a die-struck original.

Patina and surface quality require handling experience but several indicators are accessible. Genuine ancient silver develops toning through burial: crystalline iridescence, even dark toning with colour variation, or stable surface encrustation that shows micro-porosity under a loupe. Applied patina is chemically different: it tends to be uniform, slightly waxy, and unstable — it sometimes rubs off with handling. For bronze coins, genuine deep-burial patina adheres to the coin’s surface and resists a point probe in a way that applied patina does not.

Die style is the most reliable indicator and the hardest to fake convincingly. Ancient coin dies were engraved by trained artisans, and the specific vocabulary of each workshop — the way the die-cutter rendered the iris of the eye, the cheekpiece of the helmet, the feathers of the eagle — is consistent within a series and distinctive against documented examples. Modern forgeries almost always diverge from genuine die style in some detail. The most reliable method is direct comparison: set a suspected coin beside documented genuine examples in auction records from CNG, Roma Numismatics, or Numismatica Ars Classica.

Die axis can be a supplementary check, but requires care. Genuine ancient coins were struck by hand without mechanical alignment between the obverse and reverse dies, and die axis does vary within many series. However, some genuine series have conventionally consistent axes: Athenian owls typically show a 12 o’clock alignment, and Roman Republican coins cluster at 12 or 6 o’clock. A consistent die axis is therefore not inherently suspicious. Where it becomes useful is when a suspected cast fake reproduces the axis of one specific known coin exactly — but this requires having a documented example to compare against, and should never be used as a standalone authentication indicator.

For any piece valued above a few hundred dollars: submit to a major auction house (CNG, Roma Numismatics, Nomos) for attribution assessment before purchase. Forum Ancient Coins and r/AncientCoins can flag obvious problems from photographs. For high-value pieces — dekadrachms, early classical owls, rare Hellenistic gold — direct consultation with a specialist is warranted. The NumisLens catalog provides documented reference images for catalogued types as a first comparison point.

Frequently Asked Questions

Identifying Your Coin With NumisLens

The NumisLens catalog covers Greek and Hellenistic coinage through the PELLA database (20,000+ Alexander tetradrachm types referenced to Price), Seleucid Coins Online (2,500+ types referenced to SC), Ptolemaic Coins Online (990+ types referenced to Lorber), and the BMC series for classical Greek city-state coinage. All of these are searchable from the identification page by denomination, metal, issuing authority, or any text you can read from the legend.

For systematic identification, the Visual Wizard takes you through denomination and metal selection to reverse type matching against the full catalog. The search also accepts catalog reference numbers directly: if you have a partial Price number or a BMC reference from an earlier attribution, enter it and the catalog returns the matching type and all supporting documentation.

For Greek and Hellenistic coins specifically, the data sources page lists every reference system in the catalog with coverage details. The about page covers the full 81,000+ type catalog and how it was built.

References

1. Price, M.J. (1991). The Coinage in the Name of Alexander the Great and Philip Arrhidaeus. 2 vols. Zurich–London: Swiss Numismatic Society – British Museum Press.
2. Head, B.V. (1911). Historia Numorum: A Manual of Greek Numismatics, 2nd ed. Oxford: Clarendon Press.
3. Hoover, O.D. (2009–). Handbook of Greek Coinage (HGC). Multi-volume series. Lancaster–London: Classical Numismatic Group.
4. Houghton, A. & Lorber, C. (2002, 2008). Seleucid Coins: A Comprehensive Catalogue (SC). 2 parts. Lancaster–London: Classical Numismatic Group.
5. Lorber, C. (2018). Coins of the Ptolemaic Empire. New York: American Numismatic Society.
6. Sear, D.R. (1978–1979). Greek Coins and Their Values. 2 vols. London: Seaby.
7. British Museum. Catalogue of Greek Coins (BMC). Multiple volumes (1873–1927). London: British Museum.
8. Thucydides, History of the Peloponnesian War, II.13. Trans. Crawley, R. (1874). London: Longmans, Green.
9. Arrian, Anabasis of Alexander, III.16–18. Trans. Brunt, P.A. (1976). Loeb Classical Library. Harvard University Press.