Five Hundred Pounds 2017 Queen Elizabeth II and Prince Philip 70th Anniversary One Kilo of .999 Silver Proof S.R8 FDC in a large NGC holder 'One of the First 50 Struck' and graded PF70 Ultra Cameo, in the Royal Mint box of issue with certificate and booklet. Certificate number 3 of just 50 issued on the slabbed format, only 550 issued in all formats