Countermark

https://rpc.ashmus.ox.ac.uk/countermark/42 
GIC 759
denominational mark Β
rectangular 
6 x 4 mm 
A group of denominational cmks in rectangular punches were applied to coins of the Mysia-Troas-Aeolis area (759 B, 772 Γ, 790 Δ, 810 ζ, 828 H. They may have been applied at the same place (790 and 828 are doubtful in this respect). The B and Γ countermarks were probably contemporary. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC IX, 377 Show 377 4 9
RPC VII.1, 131.1 Show 131.1 6 7.1
RPC VII.1, 162.1A Show 162.1 1 7.1
RPC VI, 3924 (temporary) Show 3285 1 6
RPC VI, 3923 (temporary) Show 3284 3 6
RPC VI, 3922 (temporary) Show 3280 1 6
RPC VI, 4287 (temporary) Show 3838 6 6
RPC VI, 10948 (temporary) Show 3188 1 6
RPC X, — (number not assigned), type ID 62056 Show 1316 3 10