Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1029 
GIC
Antoninus Pius, laureate head l., with legend around illegible (on silver coins)
oval 
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC II, 1803 Show 1803 3 2
RPC II, 1803 Show 1803 33 2
RPC II, 1803 Show 1803 12 2
RPC II, 1803 Show 1803 36 2
RPC II, 1803 Show 1803 9 2
RPC II, 1804 Show 1804 35 2
RPC II, 1806 Show 1806 9 2