Can you post photos of the stamps on the butt and side of the frame? The GG6 is the assembly code number. What is the evidence the serial number has been moved? Is the grip frame shorter because it has been ground down? S&W did stamp serial numbers on the left grip frame occasionally, but usually due to damage to the butt part of the frame. Are there any other markings of any kind anywhere else on the gun, other than the butt & back strap and , I assume, the usual S&W factory stamp on the barrel rib? I have asked a fellow S&W collector, whose lovely wife is Japanese, to ask her if she can translate the markings, or confirm they are old style Kanji marks. Ed.