Watch List notes:

Sixpence Commonwealth 1651 51 over 49, all stops present, S.3219, ESC 1485, no Bull equivalent, mintmark Sun, 2.45 grammes, Fine/Good Fine with some edge nicks, struck on a slightly wavy flan, our archive database shows that we have only previously offered one example of this overdate type in 17 years

Estimate: 200-300 GBP