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 1307 4 8
RPC VIII, — (number not assigned), type ID 20714 Show 1571 1 8
RPC VIII, — (number not assigned), type ID 20719 Show 1578 1 8
RPC VIII, — (number not assigned), type ID 20719 Show 1578 2 8
RPC VIII, — (number not assigned), type ID 20714 Show 1571 6 8
RPC VIII, — (number not assigned), type ID 73260 Show 1875 21 8
RPC VIII, — (number not assigned), type ID 21055 Show 2042 6 8
RPC X, — (number not assigned), type ID 63390 Show 2726 3 10
RPC X, — (number not assigned), type ID 60528 Show 3697 4 10
RPC VIII, — (number not assigned), type ID 73258 Show 1864 50 8
RPC IX, 1052A Show 1052 1 9
RPC VI, 30529 (temporary) Show 4022 2 6
RPC IV, 2727 (temporary) Show 3465 3 4.2
RPC VIII, — (number not assigned), type ID 75236 Show 1577 3 8
RPC VIII, — (number not assigned), type ID 87998 Show 1621 2 8
RPC VIII, — (number not assigned), type ID 20715 Show 1573 2 8
RPC VIII, — (number not assigned), type ID 20753 Show 1630 25 8