Old Soldier - I know it's not Cataract. I only shared an illustration to show something similar.
As we know, the wheel gets reinvented all the time. A couple of decades ago I was dwelling about improving lock time and thought of an electronic trigger to get rid of all the mechanics that slows lock time down. Then I read W. W. Greener's book,
The Gun and its Development, and learned that an Englishman came up with the idea back in the 19th Century! A colleague's son was quite brilliant and wanted to develop a remotely operated gun with a camera that peered through the rifle scope. I told him I was playing with one over a decade (back in the early '90s) ago at an anti-terr conference. One camera was for spotting and the other was for looking through the scope. It could be mounted on a tracked vehicle and driven into position too without exposure to the human operator. That scuttled his son's idea. Another benefit of the conference is that I got to meet Col. Rex Applegate (WW II OSS instructor and author). Paladin Press was there and they had ONE copy of his
Killed or Get Killed that I snatched, ripped off the plastic wrap, walked up and introduced myself and had him autograph my copy.
BTW, Greener's book was one that I could not put down once I picked it up. Same with Ned Robert's
The Muzzle Loading Cap Lock Rifle. I bet both books are on Google books now, but I'm happy I have hardback paper. The interweb can go down, but all I have to do is walk to the library to get access (ahem, next room over) to either.
I'm undecided on that optical device that is the subject of this thread and wrote one Englishman who specializes in early optics, gave him a link to this thread and asked for his opinion. The opinion I'm waiting for is David Minshall. David knows of my research and has my first book (on sharpshooters) and it's probably why the world knows of Charles Wilson Peale and his scoped rifle (it's also why everyone knows of the whitworth shots from Fort Sumter to Fort Putnam on Morris Island).
I could also form my own opinion, but would need to handle it to figure out how it could be mounted and what pieces, if any, are missing. One part looks like it could be inletted to the stock, but what about the other part of the scope. The Davidson system had two points and could be readily removed (Cleburne studying the Union lines at Franklin is a good example). Anyway, I'm undecided and want to hear from David.
ETA: I've written David myself and provided him this link. Let's wait for his opinion.