George III (1760-1820), New coinage, Half-Sovereign, 1817 (M 400; S 3786). Good fine [slabbed SANGS VF 35] £200-£260

Provenance: From the wreck of HMS Birkenhead (with certificate).

HMS Birkenhead sank off Danger Point, near Cape Town, on 26 February 1852 after striking a submerged rock; 445 of the 638 people aboard died