Yes, i'm aware that the military guns usually had it. I'm specifically referring to the late English stuff like Manton, Ketland(late), etc.
I'm mostly interested is TN and Southern, iron-mounted original guns.
I know I've seen possibly a contemporary done this way, but have never noted (or looked for) the feature on Original guns-added by the gunsmith no doubt.
I suspect that someone who had early and impressionable experience with military guns might carry this over into his civilian work. Or that buyers might request it. There, i've about convinced me that it won't be a detraction.
Lacking further evidence I'll probably just do it and see how it is received.
.. and whether I can make it whistle.
Yes the screw that clamps the top jaw. The other screw is the tumbler screw, as i gather.