Countermark

https://rpc.ashmus.ox.ac.uk/countermark/883 
GIC 747
denominational mark Α in circular punch
In two different styles 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VII.1, 601 Show 601 6 7.1
RPC VII.1, 498 Show 498 7 7.1
RPC VII.1, 489 Show 489 2 7.1
RPC III, 2031C Show 2031 6 3
RPC VIII, — (number not assigned), type ID 20079 Show 893 4 8
RPC VIII, — (number not assigned), type ID 20448 Show 1130 1 8
RPC VIII, — (number not assigned), type ID 20406 Show 1165 3 8
RPC VIII, — (number not assigned), type ID 20382 Show 1239 1 8
RPC VIII, — (number not assigned), type ID 20504 Show 1300 11 8
RPC VIII, — (number not assigned), type ID 20231 Show 1363 10 8
RPC VIII, — (number not assigned), type ID 20785 Show 1492 9 8
RPC VII.1, 594.1 Show 594.1 13 7.1
RPC VII.1, 596 Show 596 21 7.1
RPC VIII, — (number not assigned), type ID 73084 Show 1585 2 8
RPC VI, 4851 (temporary) Show 4063 3 6
RPC IX, 629 Show 629 2 9