Province Bithynia-Pontus
City Caesarea Germanica 
Region Bithynia
Reign Hadrian
Obverse inscription ΑΥΤΟ ΤΡΑΙΑΝΟϹ ΑΔΡΙΑΝΟϹ ΚΑΙϹΑΡ ϹΕΒ[ ]
Obverse design laureate, draped and cuirassed buts of Hadrian, r., seen from front
Reverse inscription ΚΑΙΣΑΡΕΙΑΣ ΓΕΡΜΑΝΙΚΗΣ (in field), ΚΕΡ-ΣΟ(Ν)
Reverse design Zeus standing facing, head l., his r. hand resting on sceptre, his l. on his hip

Coin no. 2 of RPC III, 1026

 

Museum British Museum, London (UK)
Inventory no. 1919,0417.58 (Hasluck)
Reference
Diameter 30.9
Weight 20.99
Axis
External URI of the coin https://www.britishmuseum.org/collection/object/C_1919-0417-58 
Note this is probably the coin mentioned by Hasluck, ‘Coin-Collecting in Mysia’, NC 1907, p. 441, vi, which he bought at Bursa. His reading of the letters in the field was ΠΡΟ-ΣΟ