Watch List notes:

(g) 50th Anniversary of Decimal Day | Elizabeth II (1952-), Gold Proof 50 Pence, 2021, .ELIZABETH II. D.G. REG. F.D. 50 PENCE. 2021., 5th portrait designed by Jody Clark, rev. central shape of 50 pence with inscription '1971 DECIMAL DAY' surrounded by pre-decimalised coinage, the head of Britannia and a bird, designed by Dominique Evans, plain edge, 15.50g, 12h, brilliant as struck, with Royal Mint certificate of authenticity (No. 400).

Estimate: £800 - £1000