Serial number alignment

[BirdOfPrey]

Originally Posted by mrerick

It's not uncommon to see anomalies in the stamped markings on these pistols. I have one from 1936 with an overstamped first serial number digit that is factory. An inattentive technician picked up the wrong die (the second digit's die) then overstamped it with the correct first digit. This passed inspection.

Check the inside of the trigger plate to see if it is blank, has "20" stamped inside or "21" stamped inside.

Which is correct? Blank, 20, or 21? Thanks for the info.