Great Britain. First Strike Gold Set: 100, 50, 25 and 10 Pounds, 2011. S.PBG34; KM-1234-1231. Total weight 1.85 ounces. Elizabeth II. Reverse; Britannia set against a background of a rippling Union Flag. Certificate of Authenticity number 001. PCGS graded Each coin, Proof 70 Deep Cameo First Strike. Estimate Value $2,250 - 2,500