-UPDATE- Well It took a while to clean the M39 up it had some bad surface rust. I used a new product called "Barricade" and that stuff worked amazingly well in taking off the surface rust! It took the rust of with a little scrubbing and came out clean. This stuff is great! And it also guards the metal against moisture. This stuff is like snake oil for guns. Anyways, when I was scrubbing away I noticed a mark on the bolt head. It was marked [V.K.T.] I never new that the finns marked or maybe manufactured bolt parts. I have pics below of bolt head and the rifle all cleaned up. Is the [V.K.T.] mark on the bolt head common? Thanks

