I had a top lever rifle with this action. It is the early "Climax" action. Man do I love that name!
Mine was a 450-400 2-3/8" case. Same large protruding action balls that are larger than the barrel diameter. Some may think it's the Dominion, but this action pre-dates it.

Wish I still had the rifle. Gold washed internals,that was pretty common on some Holland Guns and Rifles. Really trim rifle.

Mark