Countermark

https://rpc.ashmus.ox.ac.uk/countermark/813 
GIC 693
Χ?
uncertain 
uncertain 
noted as being on a coin of Maximus from Germanicia Caesarea (Commagene) in Numismatishe Zeitschroift (Vienna) 33 (1901). 46 no. 95. As only the reverse was illustrated and there does not appear to be a cmk on it, presumed that the cmk was on the obverse? 

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC VI, 30591 (temporary) Show 2225 1 6