There is one, and only one, instance where an import mark can actually ADD value to a gun, I'm referring to the very rare "Irish Navy Lugers". The import mark on these guns is stamped on the right frame rail and is visible only when the gun is disassembled. To learn more about these rare guns, read this thread by my friend Dick McEvoy.
Norm
http://luger.gunboards.com/showthrea...t=irish+lugers