I found a 1945 penny today that is reddish in tint(something I've seen many times) but it caught my attention when I dropped in on the table and it made a strange sound that I can't recall having heard from any other wheats I have. it appears to be thinner than the other pennies as well. it's fairly worn but not so much that you can't clearly decipher all the writing. would a thinner planchet make the coin sound different? I'm stumped on this one.