Boy that's interesting Bill,
The second gun that is.
It may have been a target arm.
We normally see a wing nut, (or thumbscrew) on wheel-locks, so the lock can be dismounted easily for cleaning.
This rifle seems to have that exact same feature.
The first one you show, has a rather unusual (to me at any rate!) sideplate and is very well done.
Still Bill, this second one takes the biscuit in my eyes, and although it's not my business, I'd leave it as it is and enjoy shooting with it!
It is very nice work!
PS,
Does the front lock screw actually do anything Bill?