Watch List notes:

British Coins, Oliver Cromwell, shilling, 1658, by Thomas Simon, laur. and dr. bust l., the reverse smoothed and neatly engraved with double initials, GH and DD (cf. S.3228; ESC.1005; Bull 254), milled edge visible and obverse about extremely fine, a rare souvenir
The style of engraving suggests late 18th – early 19th century.
Estimate: (500-600 GBP)