That has to be one of the best unit markings I have ever seen! And what is even better is that this is an unaltered S.71/84 of the original style, with square-ended fullers (the second type with longer fullers was introduced in 1888, one year after this example was inspected)! And not only is it "Germany's first compact bayonet", but it is the first true knife bayonet in the world, quickly copied by Mannlicher, the Swedes, etc.
It is indeed true that most surviving examples of the S.71/84 are Bavarian-marked - they kept this in service officially until 1903, but in fact with rear-guard units right into WW1 while the Prussians, etc., stopped using it in 1889 or so, and also later altered many of their original 95,000+ S.71/84 to fit the Gew. 88. But in practice of the surviving original and unaltered examples of this bayonet, 99 have Prussian and Wurttenburg markings, 69 are Bavarian, and 13 are Saxon.