Differences in 39 DeLuxe rear fenders

I had what I thought was a pair of nos rear fenders that came with a 39 convertible I bought recently. As I was hanging them on the wall in the shop Saturday, I noticed the left one looked visibly shorter than the right one. I took the tape to them and the left is about three inches shorter than the right one. I know the right one is correct for the car as it still had the old tag with pt number still attached. (81A16312-C) My question is, what does the left hand fender fit?
 
It has 10 holes with an indented bead between each hole. This fender was in with the 39 convertible coupe garage find that I showed you the pics of when we were in Louisville at the nats. Guess I'll use it for trading material. :-) Thanks for the info and I enjoyed talking to you guys over there.
 
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