Very nice. I had one of those, with the matching serial-numbered bayonet. The optics in those pics, are for a SIG AMT[Dr. Wohler].
I had the only known 510-4 optic setup in the country. The guy who bought my 510, wouldn't spring for the correct optic. It eventually went to another home of a real 510.
I wish there were a board, where I could sell-off what's left of my Swiss collection. I have no interest in the stuff anymore, and it's in the way. I have lots of shooting medals, awards, uniforms, hats, and gear. All the boards are full of cheap-skates, know it alls, and lots of envious children. Most of my stuff has been sitting/hanging in my gun-room for 20-25 years. My wife has suggested for awhile that I garage-sale and/or Salvation-Army type donations. There are no museums interested in Swiss stuff, and I'm starting to become inclined to agree with her. I could probably write-off the donations. Anybody know where this stuff would sell? The Swiss rifle board [like most others] has changed. It's not better.