i'm almost certain i've seen that phrase either on a gun or related to a gun in an article before, some arcane obscure single shot IIRC but i can't find whatever it was that mentioned it. i tried an alta vista search and came up with the same thing mentioned in what was one of the only responses that had any relevance to your question - i.e. "w" was in or into and kniei was a town altho it was what must have been an alternate spelling in which the last i was a j (j being the equivalent of i in more than one language). most of the links that came up on the altavist search were in another language, all the same, which had to be polish based on some of the other place names that were recognizable.
roger