Exact match first
1947 Canada 1 cent with small maple leaf

After 1 hour, same coin without maple leaf
After 2 hours, any Canada 1947 coin with small maple leaf
After 3 hours, any Canada 1947 coin without maple leaf
After 4 hours, any small Canada 1 cent
After 5 hours, any large Canada 1 cent
After 6 hours, any Canada coin
After 7 hours, any coin