 Although coins manufactured in Ottawa between 1940 and 1947 have a C Mint Mark to signify that the coins were manufactured in Ottawa, the C Mint Mark does not exist on the 1940 and 1942 issues.The 1940 and 1941 both have re-engraved or repunched varieties.The whole date is sometimes visible as re-engraved and sometimes only the 4 followed by the 0 or 1.