Watch List notes:

Penny 1863 3 over 1 Gouby BP1863Aa dies J+g with the top of the underlying 1 showing at the top right of the 3, also with a small 'spike' at the top of the right curve of the 3 approaching Fine, a clear example, one of just a handful of examples thus far recorded of this rare type

Estimate: 500-1000 GBP