Countermark

https://rpc.ashmus.ox.ac.uk/countermark/873 
GIC 740 i
LXV
rectangular 
6 x 3 mm 
Legion XV Apollinaris. It is likely that the legionary camp at Satala drew bronze coins from Caesarea (Cappadocia). 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IV, 8010 (temporary) Show 1630 3 4.3
Show 318
RPC IV, 6861 (temporary) Show 1572 8 4.3
RPC IV, 7997 (temporary) Show 1545 4 4.3
RPC IV, 10070 (temporary) Show 1557 4 4.3
RPC IV, 6860 (temporary) Show 1575 28 4.3