I like the way this windshield mounts.but I would have to modify the brackets to use some frames I have as my pile of frames are unknown as to where some fit and the pivots are in different places.
But it appears a simple tube on each side of the body would let this type slide in,and lock in with a bolt and would be sturdy.
If it is rare I obviously don't want to mess it up.

Mack:
looks very much like an early Dodge Brothers ...much like my 1917 DB touring...always an optimist...gene french

I was thinking Dodge also. The little "caps" on top of the stanchions say it for me. That sound right?

Well dodge stuff is probably kinda scarce so i won't mess this up.Although the frames are shot,the side brackets are restorable.
I may look at using the design though. make my own brackets similar to these.

Mack,
As a DB owner ('16 touring) I can tell you that there are lots of good pieces on the frames themselves-The brass liners, the end caps and the pivot parts, for instance.
The stanchions look like early ones, with the small diameter mounting "rods." Are your stanchions straight up and down? Mine are sloped, and I think mine are wrong! (However, I think yours is from a roadster, the short lower W/S is a sign, I'm told)

Straight