Tinker,
He could have something there.
It's not easy to tell in those photos.
Originally I thought that those levers which pivot from the top pin or screw, were actually a set of intercepting sears.

I cannot see any sign of the more usual A&D style trigger sears in those photos though, so it is possible that those levers pivoting from the top screw are actually trigger sear levers, and not intercepting sear levers at all.
Would need to see more detail to verify this however.