Jeff Stephens' List would put it having been issued a serial number @ the onset of WWI and Lyund's list a year or two later. But the position of the >>Nitro<< Stamp puts it @ least @ the end of WWI if not in the early 1920s.
The Crown is either a Quality Crown or a Shooting Performance Crown. This one just might be the latter, where it was taken to the range & tweaked.
The Horn triggerbow guard is typical for cold weather environs and is quite common on inland Sauers.
Nothing short with anything about this Sauer.
Serbus,
Raimey
rse