Countermark

https://rpc.ashmus.ox.ac.uk/countermark/60 
GIC 777
denominational mark Γ
circular 
6 mm 
The origins of the coins and their size is consistent with the hypothesis that cmks 767 (B), 777 (Γ) and 796 (Δ) were part of the same system (applied at the same place at the same time). 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IX, 846 Show 846 12 9
RPC VII.2, 2599 Show 2599 20 7.2
RPC VIII, — (number not assigned), type ID 20497 Show 1311 4 8
RPC VIII, — (number not assigned), type ID 20714 Show 1584 1 8
RPC VIII, — (number not assigned), type ID 20719 Show 1591 1 8
RPC VIII, — (number not assigned), type ID 20719 Show 1591 2 8
RPC VIII, — (number not assigned), type ID 20714 Show 1584 7 8
RPC VIII, — (number not assigned), type ID 73260 Show 1896 21 8
RPC VIII, — (number not assigned), type ID 21055 Show 2061 6 8
RPC X, — (number not assigned), type ID 63390 Show 2771 3 10
RPC X, — (number not assigned), type ID 60528 Show 3753 4 10
RPC VIII, — (number not assigned), type ID 73258 Show 1884 50 8
RPC IX, 1052A Show 1052 1 9
RPC V.2, — (number not assigned), type ID 58764 Show 3113 4 5.2
RPC IV, 2727 (temporary) Show 3492 3 4.2
RPC VIII, — (number not assigned), type ID 75236 Show 1590 3 8
RPC VIII, — (number not assigned), type ID 87998 Show 1639 2 8
RPC VIII, — (number not assigned), type ID 20715 Show 1586 2 8
RPC VIII, — (number not assigned), type ID 20753 Show 1648 26 8