Final Proof or Serial Number - which first?

[Kyrie]

Originally Posted by George Anderson

This is an example of a 1920 commercial that was subsequently directed to polive use thus the left side serial number was stamped over the commercial proof. Both the side plate and locking lug may have serial numbers on their bottom.

That is correct; side plate and locking lug show two digit number on bottom edge, consistent with a commercial numbering scheme.

I'm of the opinion this is one of the 1920/1921 'n' block commercials discussed here:

http://forum.lugerforum.com/showthread.php?t=25334

Kyrie