Watch List notes:

BRITISH COINS, Oliver Cromwell, Silver Halfcrown, 1658, laureate and draped bust left, rev crowned quartered shield of arms of the Protectorate, edge inscribed in raised letters (ESC 447; S 3227A). Attractively toned with underlying prooflike brilliance, just a trace of a couple of hairlines on the reverse, good extremely fine and rare this nice.
ex Phil Wallick, Simpsonville, Maryland, USA, c.1998

Estimate: £4000-5000