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 1576 3 4.3
Show 257
RPC IV, 6861 (temporary) Show 1519 8 4.3
RPC IV, 7997 (temporary) Show 1493 4 4.3
RPC IV, 10070 (temporary) Show 1504 4 4.3