Canvas-Back:

It is the same tube steel, same Sauer process marks, same mechancis & will date to the same period of say 10 - 13 years when Sauer used the same process marks & the same expensive method of joining tubes. The Sauer Modell Nr. 5 was issued a serial number early on & probably set on the shelf until an upper rung order materialized. I do wonder if the number of Wildmann w/ a Staff stamps points toward a Sauer grade?

Oh, and H.A. Lindner all but had to have a Satellite Stamping Station in a room in the Sauer facility.

Cheers,

Raimey
rse