This is one of the most fascinating mint errors ever struck at the Royal Canadian Mint. This 1969 Canadian 25-Cent piece was struck on a 1963 Great Britain Gold Sovereign. This is a unique double denomination for several reasons. It involves, two different countries, two different dates, and is struck in gold instead of nickel. There are only a few U.S. and Canadian double denomination off-metal mint errors struck in gold in the last century. They have sold for strong prices and are highly priced by mint error collectors.
A 1969 Canadian 25-Cent piece struck on a 1967 Great Britain Gold Sovereign sold for $21,150 in a recent Heritage auciton.