Canada 1974 10 Dollars Olympic Map, Error Mule, NGC 68 PQ, Rare Mtg 320 coins, Rare coins. Error Mule coin with a mere mintage of 320 coins struck with the wrong obverse Date of 1974, Normal date should be 1973 and not 1974. Somehow dies was mismatched and used the wrong obverse 1974. instead of 1973. Canada Mint noted only 320 were struck. A rare find on this popular and in demand coin that is highly collectable. A superb strike in mint condition encapsulated byNGC.  Add this beauty to your collection.