I have two Russian captures with no import marks. Both have X's and the serial number stamped on the stock plus funky blue. On one I can see where the previous owner removed it from the bottom of the barrel. The second one does not appear to ever have an import mark or a new serial number. I'm still looking but I just can't find any indication it was removed. I guess it is possible for one to slip through and not be marked I guess. If that is not the case, how would a non-import make it into the US? Korea or Vietnam bringback? Impossible to prove without paperwork. I bought a Luger from Canada and the importing FFL must have "forgot" to mark it. Any other ideas? It just seems strange. Thanks in advance.