Dave & Jim,
FYI, if you look closely at Blake's Original Full Side View Photo of the Revolver, you'll see the Strain Screw is there, but someone either intentionally trimmed it back to lighten the Hammer & Trigger Pull or the non-threaded area of the Screw broke off sometime over the years!! Regardless of the circumstance, if it were me, I'd replace it as that light of a Trigger can be somewhat dangerous in certain situations!!
Yeah you're right. It's almost the exact same view but looks like a dark hole in post #35.