Cheif;
Tell me what I am seeing here. Is this a back action lock with the frame engraved to look like a full bar action plate. I have a J P Sauer hammerless ca 1900 which is a back action, but has a plate which is shaped like a bar action. This hammer model though, from the pic looks as if there is a joint at the rear of frame.
My hammerless incidently does not have Nitro proof. I believe the majority of pre 1912 German guns do not. I have read there was a hitch in German proof laws which was corrected in 1912, which caused the nitro proof to be excessive & too many guns failed, so as was optional most makers did not request it.