WORKS, the budget book, art and assorted knick knacks shop is selling a cinema moveable text display. Basically it is a LED light box working off 6 AA batteries. If you just want something to check negative/slide processed yourself/back from lab then it does a great job. 12" x 8" 300mm x 200mm.
It has three rows seperated by grooved strips which are just over 60mm wide so it is fine for 120 film and smaller. Maybe strips would come off for sheet film. have no need so not trying.
There weren't many left so i suspect I might be the only one to the use of this display unit.
I saw them first in Keighley, then in Burnley and decided to get one next time I was in Keighley. I thought I had missed the boat, but found a couple hidden away so I think it is going. It is sold as a cinema display, those white boards with adjustable letters that cinemas had for what was on etc.