Ron,
I find it difficult to believe that you would "ever" be speechless. I just got in from a very late visit to the Randall shop. Picked up my order, due out some 3+ months ago...(ugh)... Scott & Michael Randall "both" looked at my photos of the back of the sheath. Sorry Ron. It is their belief (not mine, dude!) that the numbers are, indeed stamped and more so, even to the point that Michael blew the photo up to an extremely large size and noticed and stamping "border".....just sayin'...
Best, Capt. Chris