The coinage of the Seleucid Empire is based on the coins of Alexander the Great which in turn was based on Athenian coinage of the Attic weight. Many mints and different issues are defined with mainly base and silver coinage being in abundance. The symbol of Seleucid power was the anchor which was placed on the obverse of coins depicting Alexander posthumously but prior to the issuence of coins portraying Seleucid I around 306 BCE.
Bronze coinage were issued in five type denominations, the weight and size varies greatly and most likely no effort was made to conform to a set standard, they may be denominated in chalkoi.1:
A size = 23+ mm = 10+ gm
B size = 18-23 mm = 6.77-8.63 gm
C size = 13-17 mm = 3.88 gm
D size = 12-13 mm = 1.59 gm
E size = 10-12 mm = 1.13 gm
Silver coinage come as follow:
With the denomination based on the Obol/And image most common on the coin.2
The coins have many images including the King with a Lion head dress or Zeus on a throne with a sceptre and eagle in each hand. Bronze coins usually didn't feature the King's image but mostly a god or goddess and in some cases like a charging bull and anchor.
Under Seleukos I Nicator (Satrap 311–305 BC, King 305 BC–281 BC), as the first king the coinage varieties are similar to Alexander the Greats coinage with his the kings head wearing a lion skin, except the wording was different with BASILEWS SELEYKWS or BASILEWS SELEUKOU. After 300bce the head of this King is portrayed in a similar style to other Greek coinage. Obverses
1:Alexander, Seleucid or Dionysis in helmet covered with a panther skin & adorned with bull's ear & horns, panther skin tied around neck.
6:Forepart of a horse facing right with an anchor above.
Antiochus I Soter (co-ruler from 291, ruled 281–261 BC)Coins Designs are much the same as the above ruler, in featuring the many Greek god's and the King's head, the style seems to evolve in the future.