I was able to gain access to an old house near Lachine and in the attic I found a centennial U.S. Half dollar, a centennial Canadian penny, five wheatback U.S. pennies, one Canadian penny from 1957, and one lead wheatback U.S. penny from 1943.
Some neat finds, actually the 1943 is zinc coated steel. Value would depend on the years of the wheat cents, most are worth very little over face value but some can be quite valuable. The bicentennial half is worth face value, and the Canadian cent might have a couple cents worth of copper in it. The steel cent might be worth fifty cents or so, it looks like it has been re plated. Can't beat it for free!