Re: mauser-nickl pistols
I'm not entirely sure that I understand your question. That being said, I understand that the Nickl 9mm parabelum did not have a chance to go into full production at Mauser because of restrictions placed on Germany after World War One ended. For this reason, the design (rotating barrel) was used under licence to make the Czeck Vz 22 pistol.
It's possible that examples were made at Mauser with and without the rotating barrel breach locking system. If you could more carefully type your question and provide pictures of your pistols it might be possible to provide additional information.