Victoria (1837-1901), Proof Halfpenny, 1839 over 43, in bronzed copper, young head left, w. w. incuse on truncation, rev. en médaille, Britannia seated right, 9.45g (BMC [Peck] 1523; S.3949), fingermarks to reverse and a nick to rim at obverse 7 o'clock, otherwise, lustrous, good extremely fine.
The Royal Mint continued to produce 1839 Proof sets and its constituent pieces for decades after the initial issue. When dies inevitably became too worn to be used, other dies would be reconstituted. In this instance a die for 1843 was re-appropriated for the purpose creating this peculiar and ordinarily impossible overdate
Estimate: £250 - £350