boltaction: If you have it apart be sure to have a close look at the Mk I trigger mechanism with tumbler rest- quite interesting. I've been told that they are OK for target shooting but gave problems with heavy use and dirt. I'd also be curious to hear what parts you find to be serial numbered. My own Mk I has numbers on barrel, action body, block,triggerguard, lever, and rear sight. My barrel is dated '74 although the stamp on the body is '73.

Ridolpho