Watch List notes:

Greek Asia. Kings of Bosporos. Aspurgus, as king with Caligula (AD 14/5-37/8). AE 12 units, Bosporus. Obv. Head of Caligula right. Rev. Head of Aspurgos right; behind, monogram; before IB. RPC I 1903. AE. 8.00 g. 21.50 mm. Smoothed surfaces. About EF.