I could not find a repair proof, but that doesn't mean there isn't one. It is possible that it was new in 1937, but unlikely. You could have a similar gun made today, if you want one badly enough. I agree with Raimey that a close "hands on" inspection of the markings might reveal something. I'm sure you will find that the bullet is 8.2 grams rather than 82 grams.
Mike