GREAT BRITAIN. Platinum 5 Pounds Piefort, 2016. Llantrisant Mint. Elizabeth II. NGC PROOF-70 Ultra Cameo.S-L44. Mintage: 90. APtW: 3.0286 oz. Commemorating the 90th birthday of the queen. One of the first 10 struck, this flawless example abounds with intense eye appeal.NGC PROOF-70 Ultra Cameo.