Watch List notes:

William IV (1820-30), Proof Sixpence, 1834, bare head right, rev. coin alignment, value in wreath, edge milled (ESC 2506 (R3) {1674}; S.3836), toned with underlying brilliance, good extremely fine, rare.
provenance
Spink Numismatic Circular, February 1978, no. 1982 - £250 - 'toned, F.D.C'
Estimate: £600.00 - £800.00