Watch List notes:

British Coins, William IV, proof shilling, 1837, bare head r., rev. value within wreath (S.3835; ESC.1277; Bull 2498), certified and identified erroneously as S.3834 and graded by PCGS as Proof 61, very rare
The only example graded PF61 by PCGS and the only proof example graded by PCGS.
(1200-1400 GBP)