interesting and perceptive observation Larry. the "Helice-Crip" "Brevet" "SGOG" does not have a left stop.

I believe this is Skeetx's gun and I believe we've discussed it several times without understanding exactly what it was...I think he asked once if it were VC and we gave mixed replies. I wonder what patent the gun is referring too if not VC's?
And I still think you should put quote marks "Helice locking system," when referring to VC's 4 lock invention.
I've never thought about the through bolt business on a top lever. Interesting. Very well done. Now I'd like to tear into my "Wonder" to see what's actually there...If I wasn't afraid that I couldn't put it back together again.