The Nomos denomination
The Nomos was an ancient Greek silver denomination weighing approximately 8 grammes.

It was roughly equivalent to the Attic didrachm or the Achaean stater, and is most often used about coins struck in Magna Graecia, especially Italy.
Nomos
(1) Taras
/Files/Images/Coinsite/CoinDB/Taras.jpg
An AR Nomos struck 280-272 BC in Taras
Obverse: Nude youth crowning himself on horse standing right; capitol of Ionic column below; IΩ / IAΛO

Reverse: Taras seated on dolphin left, holding akrostolion and spindle; ANϘ / TAPAΣ

Diameter: 20.5 mm
Die Orientation: -
Weight: 6.31 g
No notes for this coin
HN Italy 1014, Vlasto 803 ff.; SNG ANS 1142 ff., SGCV I 363 var.
(2) Tarentum
/Files/Images/Coinsite/CoinDB/32831b4e-446e-4e8a-8cc2-4fbbb750c6ba.jpg
An AR Nomos struck 281 - 272 BC in Tarentum
Obverse: Nude warrior on horseback left, carrying small round shield

Reverse: Taras seated on dolphin left, holding Nike in right hand; waves below.

Diameter: -
Die Orientation: -
Weight: 7.82 g
No notes for this coin
Vlasto 684-686; SNG ANS 1060
(3) Tarentum
/Files/Images/Coinsite/CoinDB/Naville_Numismatics_Tarentum_Nomos4.5.png
An AR Nomos struck c. 302-280 BC in Tarentum
Obverse: Nude rider on horse, holding shield and two spears with left hand, Greek text to upper left (ΦΙΛΩΝ) and lower left (ΕY)

Reverse: Phalanthos, nude, riding dolphin above waves, Nike in right hand, crowning with wreath of laurels, left hand resting on dolphin, Greek text to the upper right (TAPAΣ)

Diameter: 23 mm
Die Orientation: -
Weight: 7.81 g
This particular issue was minted in the years prior to Tarentum's final deafeat by Rome in 272 BC. The depiction of Nike crowning Phalanthos likely celebrates a military victory in the ongoing struggle against Rome. Phalanthos was a hero of Greek mythology, leader of the Spartan Partheniae and the mythic founder of Tarentum.
Vlasto 683; SNG ANS 1059; Historia Numorum Italy 964
(4) Tarentum | Ari
/Files/Images/Coinsite/CoinDB/download_(2).jpg
An AR Nomos struck 332 - 302 BC in Tarentum
Obverse: Nude, helmeted warrior on horseback to right, holding spear in right hand and shield and two more spears in left hand; [Ξ] in left field, [API] below horse

Reverse: Taras astride dolphin to left, holding oar in left hand and a kantharos in outstretched right hand, KΛ below dolphin, [TAPAΣ] to right.

Diameter: 21 mm
Die Orientation: -
Weight: 7.12 g
Calabria, Tarentum
HN Italy 939; Vlasto 636
(5) Thourioi
/Files/Images/Coinsite/CoinDB/Thourioi.jpg
An AR Nomos struck c. 400-350 BC in Thourioi
Obverse: head of Athena right wearing crested Attic helmet decorated with Skylla; E

Reverse: bull butting right; fish swimming right below; ΘOYPIΩN

Diameter: -
Die Orientation: -
Weight: 7.65 g
No notes for this coin
HN Italy 1783; cf. SNG ANS 1015
(6) Velia
/Files/Images/Coinsite/CoinDB/Velia(1).jpg
An AR Nomos struck 334-300 BC in Velia
Obverse: Head of Athena left, wearing a crested Phrygian helmet decorated with a Centaur

Reverse: (KE) monogram of Kleudoros Lion standing left devouring prey A / Φ YEΛHTΩN (unreadable)

Diameter: -
Die Orientation: -
Weight: 7.25 g
No notes for this coin
Williams 328 (O174/R244); HN Italy 1294; SNG ANS 1337