1745/3 George II 1/2 Crown Great Britain Rare Overdate Colonial Silver Coin (23121003R)Circulated George II Great Britain sterling silver 1 2 crown coin. Variety not minted from Spanish Treasure silver captured by the British at Lima Bay, Peru. Rare overdate variety with date 1745 3. English Silver Coins 604A, rated R2. Type of coinage that circulated in the American Colonies.