Not pre-war, but I picked up three Dormand Yankees postcards a couple of years ago off the 'Bay. All three were stamped and mailed to someone in the Bronx who must have requested them from the players. The J.Collins is signed on the back and the Rizzuto is addressed in his hand. Not sure about the addresses on the Collins and Bauer.
I would not trade these for nrmt copies without the writing and postmark/stamp.
