I would venture a guess that mechanic A. Englemann was a stocker. Don't know of him right off. F.B., W.B., A.W. and possibly a few more sets are found on the upper rung offerings of Sauer and those mechanics were either the actioner, action filer or frame filer. If we could assume that A.W., F.W., T.W. were all of the same family and all of Suhl it would make unknowns a bit simpler. August Wagner was listed as a tube maker while Fritz Wagner was listed in Suhl. I don't think August Wagner would be doing any frame filing. August Bräutigam was a frame filer from Merkel and could have been sourced by other makers. Sticking to Suhl there was August Weiß and possibly an Alfred Werner depending on when he was active. There is a long tradition of gunmaking by the Werner family in Suhl.
Kind Regards,
Raimey
rse