Watch List notes:

William IV (1830-37), Halfcrowns (2), 1836 (ESC 2482 {666}); another; 1836 over 5 (ESC 2483 [R3] {666A}; S.3834), both once cleaned and with surface marks behind head, otherwise very fine or better, the second rare (2).
provenance
ii) Spink Numismatic Circular, May 1994, no. 3312 (illus.) - £100
Estimate: £200 - £250