Love the strong doubling on that nickel, Roger! Those linear die clashes on the reverse can also be found in varying degrees of length, sometimes running from the log the beaver sits on up to the "1" and around under the word "CENT". And often you can find marks in the king's ear as well. If you check the other coins in your collection you may find them on the other years of the 1940's or even late 30's, right through to about 1951 or so. A truly nice little set to hunt down, and you should be able to find several to augment your set. Good luck with the hunt and congrats on your find!