Thanks for the parts breakdown Researcher.
With the bolt tapered on both the bottom & back side, it should add a good deal of reinforcement to prevent frame bending. Most double gun frames are up to the load without a top fastener of any type.
One would think. But, every, single Tobin for sale on the web at the moment looks exactly like this:
The photog went out of his way to camouflage the fact that this is a sick gun. I’d be willing to bet the pin and lump have almost no wear. Few of them do.
But, a lot of Tobins, look just like this.
Best,
Ted