Watch List notes:

Britannia 20th Anniversary Platinum Proof Collection 2007 a 4-coin set comprising £100 (1 ounce), £50 (Half ounce), £25 (Quarter ounce) and £10 (One Tenth ounce) all in .9995 Platinum, FDC cased as issued with certificate, number 009 of just 250 sets issued, this set listed by Spink as PPBCS1

Estimate: 2300-2600 GBP