I started to agree with you, but then I realized that I can't say that for certain, as I own three Mosin-Nagants, and an 1868 Swiss Vetterli. I can say that that is true while they've been in my possession...
You got me there, too. I do have guns that have a history. I should have qualified that with “while in my possession”.
One is an 1895 Mosin, captured by the Finns in the Winter War and redone into a Model 39 in 1968. It still bears the mark of the Czar.