The Pobjoy Mint has struck these special Gold & Silver coins from Gibraltar. This is the only known example that has been graded by NGC as a perfect Proof-70 Ultra Cameo! These 1 Crown coins were struck in a special 50/50 alloy of Gold and Silver reminiscent of the ancient Greek Electrum coins. In this vein, a lion and bull are facing each other on the reverse. The usual likeness of Queen Elizabeth II is on the obverse. Gold content is 1/2 of an ounce, combined with 1/2 ounce of silver.