Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1214 
RPC I index —
S O
For a table of the Spanish countermarks, see here

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 55 Show 55 169 1
RPC I, 58 Show 58 116 1
RPC I, 55 Show 55 175 1