Watch List notes:

Elizabeth II (1952-), gold 4-coin Britannia proof Set, 2005, struck in 999.9 fine gold, One Hundred Pounds, Fifty Pounds, Twenty Five Pounds, Ten Pounds, coins weighing One Ounce, Half Ounce, Quarter Ounce, Tenth Ounce respectively, crowned head right, IRB initials on base of bust for designer Ian Rank-Broadley, Latin legend and toothed border surrounding, rev. designed by Philip Nathan, the seated figure of Britannia facing to the left holding a trident with a shield at her side, with the inscription surrounding (S.PBG24). All proof as struck with original Royal Mint box and certificate of authenticity.
Estimate: £2,500-3,000