[DonVoigt]

Lots to comment on-
to the OP- you have a late DWM or BIKW pistol, in the U block, we don't call them "sneaks" but " '29 commercial" luger now. They were never "sneaks" , which I believe was another made up marketing term(JMHO), or simply a good story.

The markings on the chamber and toggle link, have not been "removed by buffing"; and are absent because they were never there! I see no evidence that it has been refinished. Of course it was made with a lug and hold open in about 1929- as it should have been.

It is marked "differently" as it is a commercial pistol that was taken into and accepted by the military. It did not start out as a military contract.

It has been "apart" , as the small pin in the toggle knob seems to be missing.

It is police marked on the front strap, or was, as the markings have been mostly removed.
Not all police lugers received a sear safety, or a magazine safety; lugers for the "barracked" police did not receive these additions. So their absence is not strange at all.

I do wish folks would be sure of their "facts" before posting authoritative sounding errors and promulgating luger misconceptions. JMHO.