Countermark

https://rpc.ashmus.ox.ac.uk/countermark/156 
GIC 36
ϹΜΥΡ, Alexander?, bust r.
circular 
12.5 mm 
Two examples (M.415 and 415a) may represent Elagabalus instead. See GIC 33-4. 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 4669 (temporary) Show 3719 5 6
RPC VI, 4669 (temporary) Show 3719 2 6
RPC VI, 4669 (temporary) Show 3719 3 6
RPC VI, 4669 (temporary) Show 3719 4 6
RPC VI, 4669 (temporary) Show 3719 1 6