Manufacturing stopped at Zella-Mehlis when the Red Army over ran it in 1945.
Marking varied, pre war they were proofed with a crown over N. Nazi eagles during the war, and toward the end they were very rough with no proof marks sometimes.
Hämmerli, of Lenzburg, Switzerland, did manufacture Olympia models under licence during the 50s - if I don't err - as did Manurhin with the normal PPs, PPs Sport and PPKs.
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