Marcus:

Ok then, there's very little chance it is Emil Funk's master example but it is odd that he finished the frame as well as assembled the tubes and fitted the tubes to the frame. Usually a separate person was sub-ed to do each individual task and their initials were a means of tracking payment for who did what. There's an engraver in Suhl that is a historian on engraving and possibly could give the engraver and maybe confirm the maker. I can PM or email you his contact info. But if Emil Funk did make it, then he must have been a master gunsmith by 1917.

On the Christoph August Funk, usually the tube maker's initials as well as the date was stamped on the underside of the tubes during that period.

Valentin Funk double rifle - 1844

Kind Regards,

Raimey
rse