According to an old encyclopedia, Kriegern in 1890 was a small country town in then Austrian Bohemia, with 2900 inhabitants, all German speaking. In 1945 all German people were killed or driven out of Czechoslovakia. The gun was first proofed in either Suhl or Z-M, pehaps in the white. Later, in then Czechoslovakia, the German proofmarks were mostly removed,leaving the crown/S mark. In 1925 (ledger number) the gun was reproofed in Weipert/Vejprty, NPw stamp and small 2 inside Lion. Up to 1931 the Chechs continued to use the former Austrian proofmarks, merely substituting the imperial eagle by the Czech rampand lion.
Here we have the multiple use of a tradmark by different companies again: On one side Nimrod, after the great hunter of the Bible, was the trademark of the Suhl gunmakers Thieme& Schlegelmilch, known not only for their proprietary Nimrod line of cartridges, but also for Nimrod falling block rifles, the Nimrod breeching of break-open and, last but not lest, for the hand-detacheable Nimrod box- and sidelocks, perhaps the best lock designs ever for safety and trigger pull.
On the other hand we have the completely unrelated Nimrod Werke in Bergstetten. These started as the foremost maker of clay targets in Germany, soon adding the traps from hand throwers to hydraulic machines to the line. For many decades they held nearly a monopoly on clay equipment in Germany. Even later they expanded their line to all target shooter's supplies.
Apparently this gun was given by the Nimrod Werke as a "Wanderpreis" to a local trapshooting club in 1925. A Wanderpreis was indeed handed from one winner of the yearly event to the next, but if a person wins the "Wanderpreis" for the third time, it is permanently owned by that winner and a new Wanderpreis is given to the contests.