Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1486 
GIC
TOMI
rectangular 
6.5 x 2.5 mm 
The punch is smaller the that of GIC 567 and was applied to a coin that was not worn flat. The T is not clear 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 1656 Show 1656 122 1