The gold wash/tint has me a bit puzzled. But it somewhat akin to a Sauer Model 20, but the engraving looks like that of an apprentice via the aid of a stencil. F.W. Heym had a similar one as a Model 122 and there were others, with some having a bit more side-frame reinforcing. Many refer to it has having a "Scott" opener. It looks to have passed thru the Suhl proofhouse post 1912 and if the date was later than 1923 there will be a date stamp below the "8,7mm" over "72"?? stamp. It has a "Crown" over "E" denoting an additional Express proof. And there appears to be a Schilling forge stamp on the rifled tube. The marks from the forward lug to the forend hanger will yield the most info. So a pic of that area would be most beneficial. Also the steel type stamps on the sides of the tubes will give the steel maker. On the average hammer drillings usually don't realize much over $2k U.S. of A.

Kind Regards,

Raimey
rse