Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1205 
GIC
Capricorn, r. (6 mm square)
square 
6 mm 
Hypaepa cmk might be smaller than the perinthus one 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1762A Show 1762 1 1