only if it was a police model.
Certain lugers were sold / bought by the police. If it has one, then it is proof that at least in 1933 and higher, that it was with the police. I am sure there are other guns that were issued to police and there were no police unit marks or sear safety, but since it was a requirement, the chances are that most police issued guns had a sear safety put onto it.
Ed
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