Countermark

https://rpc.ashmus.ox.ac.uk/countermark/881 
GIC 745
denominational mark IS
circular 
5.5 mm 
1½ asses. Mainly on reverse (GIC mentions one on obverse) 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1359 Show 1359 1 1
RPC I, 1359 Show 1359 4 1
RPC I, 1359 Show 1359 11 1
RPC I, 1359 Show 1359 15 1
RPC I, 1359 Show 1359 19 1
RPC I, 1359 Show 1359 23 1
RPC I, 1359 Show 1359 25 1
RPC I, 1359 Show 1359 26 1
RPC I, 1359 Show 1359 36 1
RPC I, 1359 Show 1359 21 1
RPC I, 1359 Show 1359 38 1