How to Identify the Tarentum (Taras) Dolphin Rider Nomos

What It Is

Tarentum (Taras to the Greeks), the leading city of Magna Graecia in southern Italy, produced one of the most prolific and varied silver coinages of the ancient Greek world from the late 6th century BC into the 3rd century BC. Its most recognizable type pairs a mounted horseman with the mythical founder Taras riding a dolphin, celebrating both the city's famous cavalry and its foundation legend.

Obverse

The obverse typically shows a nude youth on horseback, sometimes shown crowning the horse or himself with a wreath, holding a shield, spear, or small round object, reflecting Tarentum's renowned cavalry tradition. Designs vary widely across the long series, with different riders, poses, and accompanying magistrate names or symbols in the field.

Reverse

The reverse shows the hero Taras, son of Poseidon, riding a dolphin toward the shore, often with arms outstretched or holding an object such as a distaff, cantharus, small figure, or trident. The city name TAPAΣ (Taras) usually appears beneath or beside the dolphin, and beneath the waves a small shell, wave pattern, or additional symbol may appear.

Size, Weight, and Metal

These are silver coins called nomoi (equivalent to a didrachm), struck on the Tarentine (a reduced Achaean/Corinthian-influenced) standard at roughly 7.8 grams, though weight and fabric shift gradually over the coinage's long lifespan as styles evolve from archaic through fine classical and later more elaborate Hellenistic engraving.

Identifying the Issue

Tarentum did not use a fixed single design; hundreds of obverse and reverse die combinations exist, distinguished by the rider's pose, accompanying magistrate names, small control symbols, and letters in the exergue. Collectors typically identify a specific issue by comparing these small details rather than expecting one "standard" design.

Telling It Apart From Similar Coins

The dolphin-rider reverse is essentially unique to Tarentum and its close imitators, so it is rarely confused with other cities' types. It can, however, be confused with other Tarentine sub-types that swap the dolphin rider for other reverse figures (such as an owl or a scallop shell) on rarer issues, so it helps to confirm the dolphin and rider combination specifically.

Grading and Condition

Because the series spans centuries and many dies, condition should be judged by strike centering, wear on the horse's legs and rider's head on the obverse, and clarity of the dolphin's fins and the TAPAΣ legend on the reverse. Well-centered strikes with full legends are considerably more desirable than off-center or worn examples.

Authenticity Red Flags

Watch for cast surface texture, blurred or "melted" detail in the horse and dolphin, incorrect weight for the nomos standard, and modern tooling used to sharpen worn details or fabricate a rare magistrate name. Because so many genuine die varieties exist, an unusual combination is not automatically suspicious, but should still be weighed against known style and fabric for the period it claims to represent.