Need help with Unit Mark?

[barr44]

Don,
Thanks again for some great information. If you need other better photos of the pistol or it's parts, let me know.
I am a little confused(nothing new) about the 1920 property mark. Are you telling me that the gun was already being used by the police and that it was marked with 1920 to indicate it was govt. property?
I was under the impression(probably wrong) that the 1920 property mark was part of a program that the government undertook to get govt. equipment marked according to some dictates of the Versailles treaty. I thought that at that time there was a big push to refurbish equipment and have it properly marked as govt. property. Also, thought that at that time, a lot of the guns meant for the police would have the police safeties installed by govt. arsenals.
I would appreciate any clarification that you would care to share.
What are you compiling a data-base on, double date lugers or police or unit marked lugers? I may have another to add to it in either case.
Thanks again for your help, barr