The first paragraph writes about royal (state) proof which is something already well known.

The second paragraph is refreshing and quite interesting:

"Besides that, this gun was proofed for good shooting, and the barrels are therefore bearing the marks /two crowns/"

It doesn't seem clear if the two crowns were applied by the proof house, or the Sauer factory; I'm inclined to think the factory.

Good work, Geno and Raimey!

With kind regards,
Jani