Kingdom of Bosporos, Rhescuporis V and Constantine I. AE Stater. 
Dated Year AKX = 621 local era = AD 324-325. 

Obv: BACILEYC RHCKOYPORIC, Diademed and draped bust of 
Rhescuporis V right, wreath in right field. 
Rev: diademed, draped bust of Constantine right, date AK-X across 
fields. 

MacDonald 680/2; Anokhin 770.

With permission of cngcoins.com, Electronic Auction 265, Oct. 2011.