Countermark

https://rpc.ashmus.ox.ac.uk/countermark/835 
GIC 716
Μ in square punch
 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC III, 2809 Show 2809 4 3
RPC III, 2810 Show 2810 3 3
RPC III, 2810 Show 2810 5 3
RPC III, 2810 Show 2810 8 3
RPC III, 2810 Show 2810 2 3
RPC III, 2810 Show 2810 4 3
RPC III, 2810 Show 2810 10 3
RPC III, 2809 Show 2809 7 3
RPC III, 2810 Show 2810 17 3
RPC III, 2810 Show 2810 18 3