Watch List notes:

William IV, proof shilling, 1834, bare head right, rev. 'face' value within wreath, crown above, date at bottom, reeded edge (S.3835; ESC.2490), certified and graded by NGC as Proof-64, medium golden grey toning, very rare proof of record, choice
Two others graded as Proof-64 by NGC, none higher.

Estimate: 2500 - 3000 GBP