United Kingdom 2015 Gold Proof Set the five-coin set Five Pounds to Quarter Sovereign, the first gold set with the new Fifth Portrait FDC in the case of issue with certificate and booklet stating a mintage of only 500 sets, the last five-coin sets with the Rank-Broadly portrait, all apparently sold out by the Royal Mint within 7 days of issue
Estimate: 2400-2800 GBP