Countermark

https://rpc.ashmus.ox.ac.uk/countermark/1066 
RPC I index 33
R in circle in circular punch
For a table of the Spanish countermarks, see here

Coins with this countermark

Number Image TypeNumber CoinNumber VolumeNumber
RPC I, 263 Show 263 21 1
RPC I, 263 Show 263 26 1
RPC I, 264 Show 264 9 1
RPC I, 264 Show 264 57 1
RPC I, 271 Show 271 1 1
RPC I, 403 Show 403 22 1
RPC I, 417 Show 417 84 1
RPC I, 439 Show 439 37 1
RPC I, 273 Show 273 143 1
RPC I, 273 Show 273 144 1
RPC I, 271 Show 271 58 1
RPC I, 270 Show 270 80 1
RPC I, 270 Show 270 91 1