Double Date Question

[ithacaartist]

Recently, someone asked about a Luger with only a 1920 on the chamber. As I recall, it was diagnosed as a commercial that had been put into gov't service, and thus property-stamped 1920 on a formerly,characteristically blank chamber. The pics showed the digits had been stamped slightly off-center, and not strictly lined up. This irregular rendering of the 1920 shows it to be a property stamp, which I believe was usually applied by hand--far removed from the process of roll stamping the receiver at the factory with a die. So, I figure that property stamped receivers could have just about any other original date along with the misaligned 1920, up until when the property stamp was discontinued (when, I forget; '22 or '23?).