GIC 317
animal suckling child in oval punch
square (with curved sides) 
7 mm 
possibly Amaltheia and Zeus. Legend claimed Zeus was born on the acropolis of Pergamum or a deer suckling Telesphorus. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC III, 1704 Show 1704 1 3
RPC III, 1716 Show 1716 3 3