Other emails suggest it has a pre-1910 plug gauge stamp of 118/35 and a powder type & bullet weight/type for the solid projectile. I hope the images are forthcoming. I am curious if there is a monogram on the standing breech. I would guess that F.W. Keler took the order and then subcontracted the work to one of the mechanics in the Zella-Mehlis area. The "Prima" fluid steel stamp, action type derived from the Roux monicker, engraving and a few other items seem to be reminiscent of the Zella-Mehlis area. Interesting musselshell type side frame reinforcement. I don't have the catalogue with me and maybe Baumgarten can confirm, but that may have been on some of the F.W. Keler models. The stamp of his name with the area Thurgunia(?) suggests an export type to me.
Kind Regards,
Raimey
rse
