Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1553 
GIC 754 i
denominational mark Β
incuse 
8 x 4 mm 
Applied at the same time as GIC 786 ( Δ ο). Callu suggested that the o stood for obols (he assumed 1 obol = 2 assaria). Johnston (p. 217) suggested that the B 'appears to be engraved on the die'. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC X, — (number not assigned), type ID 63879 Show 506 2 10
RPC X, — (number not assigned), type ID 63879 Show 506 13 10
RPC X, — (number not assigned), type ID 63879 Show 506 14 10
RPC X, — (number not assigned), type ID 63879 Show 506 11 10
RPC X, — (number not assigned), type ID 63879 Show 506 10 10
RPC X, — (number not assigned), type ID 63879 Show 506 21 10
RPC X, — (number not assigned), type ID 63879 Show 506 8 10
RPC X, — (number not assigned), type ID 63879 Show 506 6 10
RPC X, — (number not assigned), type ID 63879 Show 506 23 10
RPC X, — (number not assigned), type ID 63876 Show 508 7 10
RPC X, — (number not assigned), type ID 63876 Show 508 4 10
RPC X, — (number not assigned), type ID 63876 Show 508 3 10
RPC X, — (number not assigned), type ID 63879 Show 506 22 10
RPC X, — (number not assigned), type ID 63879 Show 506 20 10
RPC X, — (number not assigned), type ID 63879 Show 506 18 10
RPC X, — (number not assigned), type ID 63876 Show 508 18 10
RPC X, — (number not assigned), type ID 63876 Show 508 21 10
RPC X, — (number not assigned), type ID 63876 Show 508 12 10