Hey Guys, thanks for the pictures and comments, please keep them coming until we figure this out for sure.

I had checked out Frank's pages on the repos, but the pictures were inconclusive. I wondered about the "vertical" vs. "horizontal" stamping of the M3 markings, but again with a lack of comparable photos I couldn't tell.

I got the knife from a friend of mine who is retiring and selling off some stuff, he may not have known that it is a repo if it indeed turns out to be one. I want to be absolutely certain before I say anything, I am sure you all can appreciate why...

Hope my pictures have helped.