1920 commercial luger

[chevy]

This is my first post in the Luger forum. The first place of business is to complement the senior contributors in the forum. I have been associated with firearms for over fifty years and have never seen a more brighter group of people, there work and contributions to this firearm forum are monumental. I have only two Lugers a DWM 1920 commercial #82649 no suffix and a 1937 S42 with capture papers and German Binoculars bought from a gun show about three months ago serial #4326 Z suffix and will send pics later. The 1920 commercial Luger was purchased from my friends gun shop about two years ago. The 1920 commercial Luger has matching #s with the exception of the magazine hold open catch is a replacement it is numbered 88. The Luger has all the right crown N proofs as I can see. The bluing seems correct rust blued in the white interior. The inside of the grips are not numbered. My profession is a Gemologist so quality marks, hallmarks and stamps on metal and how they were applied I am very familiar with. The anomaly of the 1920 Luger is a CAS or GAS that is stamped on the frame rail of the piece. Using a Meji stereo microscope it appears that the stamp
was placed quite some time ago. The same style S is stamped on the frame under the grip panel. Unfortunately someone ruined the wooden magazine base on the original clip. Any additional information would be helpful