need help with 1921 chamber stamp

[DonVoigt]

Originally Posted by mrerick

Hi, the proof marks are appropriate to your pistol, and represent early Weimar period acceptance of the pistol.

IIRC all the Haenel Schmeisser milled magazines had aluminum bases. It looks like someone replaced this with a wooden base at some point.

The full serial number with suffix helps confirm that the frame and receiver are correct for the date (1922).

Is your Luger a 9mm gun?

Where is the 1922 coming from?
The chamber date is 1921!