Are these guns like Sears Appliances? They use Sears or Kenmores name but it could be a Whirlpool, Maytag, Roper or whatever.
It is possible that the Nitro stamps were used as early as 1910 and it would be a stretch but I suppose a sporting weapon began in 1908 and completed close to 1910 may have experienced the new to be proof under the 1912 Suhl rules and 1911 Zella-Mehlis rules. It is not a Sauer production model nor does it wear any of the typical inhouse Sauer stamps but during this period Sauer sourced a handful of gesteck/parts kits and the mechanics that completed the blitz action variants for them could have easily been sourced by the Boys Eckebrecht(Heinrich & Johann Eckebrecht) at H. Scherping. I have serious reservations that either Heinrich or Johann Eckebrecht applied much effort to the sporting weapon and that it was a talented mechanic, pool of mechanics, in Suhl that was sourced by the Boys Eckebrecht. From his examples after the demise of the mechanics in & around Herzberg, it is evident that H. Scherping & Sauer had a close relationship as was there a similar one between H. Scherping & the Boys Merkel. From time to time the H. Scherping concern did source the craftsmen in & around Zella-Mehlis but the proof marks worn by this example do not bear out an effort from Z-M. More than likely H. Scherping had retired and the Boys Eckebrecht were exploring new ideas on how to increase their profit margins. Since others were toying with the idea of these Blitz actions, why not peddle one themselves. And it is possible that a client ordered one from H. Scherping.
Could you measure the length of the frame, the distance from the standing breech along the water table/barrel flat interface to the knuckle?
Kind Regards,
Raimey
rse