Countermark

https://rpc.ashmus.ox.ac.uk/countermark/663 
GIC 533
ΔOMITI(ΑΝVS) or ΔΟΜΙΤ(ΙΑΝΟΥ)
rectangular or curved rectangular 
variable 
Several of the example are on RPC I, 2994 and 2995 types cmk was applied to the coins of more than one city and may have been applied in more than one place A coin which appeared on Facebook shows the inscription ΔΟΜΙΤΙΑΝΟ - now shown See: https://rpc.ashmus.ox.ac.uk/files/static/linked/GIC533.jpg and https://www.facebook.com/groups/516847581809995/permalink/982034881957927/ Sometimes on reverse 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC III, 1992 Show 1992 1 3
RPC I, 2995 Show 2995 52 1
RPC I, 2995 Show 2995 53 1
RPC I, 2995 Show 2995 54 1
RPC I, 2995 Show 2995 55 1
RPC I, 2995 Show 2995 56 1
Show 304
RPC I, 2995 Show 2995 57 1
RPC I, 2995 Show 2995 58 1