41 byf estate find - What do I have?

[Blockhead]

Originally Posted by ithacaartist

Note, also, that the fonts for the serial number on frame and bbl. are different--dissimilar 5's, 3's, etc.

Has anyone deduced the date of manufacture?

Interesting. I think I see what you are talking about, but the odd one of the bunch appears to be the numbers on the front of the receiver underneath and not the barrel numbers. The barrel numbers look identical to the ones one the left side of the receiver.