Let's have a fish about in the Odds and Ends box today and see what we come up with. I mean in a virtual sense of course as I'm opening folders on my PC rather than opening actual boxes. Nonetheless, the principle is the same, so let's just see what turns up. I will be as surprised or as disappointed as you are.
Envoy developing tanks, available in various sizes. These are made out of bakelite.
The Kodak tank on the other hand is a miracle of precision woodwork.
This is the actual moving lantern slide and pulling a lever changes from one picture to another. I'll reprise the pictures as well, but they were in my recent blog on lantern slides.
A Trichrome kit. There were many, many colour processes, dating back to the 19th Century in some cases.
Good advice from the 1920s as to How To Drive a Motor Car.
N&G Half Plate Shutter.
Some things can be quite obscure these days and I suppose the realm of collectors. One thing is for sure, collecting photographic accessories would be a very, very long project that would need specialisation in one area. No house would be big enough to house all the stuff that could be accumulated.