Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1120 
RPC I index 87
monogram
For a table of the Spanish countermarks, see here

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 13 Show 13 38 1
RPC I, 108 Show 108 423 1
RPC I, 108 Show 108 431 1