Watch List notes:

ERROR: Board of Commissioners of Currency, Singapore, $50 (3), ND (1976), serial number A/89 414007, extremely fine and wet inking error with part of reverse design visible on obverse, serial number A/86 478751, extremely fine and a rare error with partial design from obverse printed on reverse, serial number A/92 715868, almost extremely fine and part of reverse printed on obverse, rare
(Pick 13, TBB B114a, Tan E14), unusual errors and scarce.

Estimate: £500 - £600