Filmstrips !
I was searching for The Time Machine on Archive and found this:
https://archive.org/details/uncommon-ephemera-f00121-part-1-the-time-machine
Kind of a Reader's Digest version of the Time Machine movie with Rod and Yvette in 21 minutes ! Is that really a prompt to advance to the next picture or a T ?
Of course there is a wiki:
https://en.wikipedia.org/wiki/Filmstrip
And Archive has hundreds of filmstrips:
https://archive.org/details/uncommon-ephemera-filmstrips
I noticed that many of the titles shown are "in living red and white":
At first I thought this was Anscochrome syndrome:"it's really good for taking pictures of pizza"
https://spruemeistermodelwerkes.com/2019/02/24/the-heartbreak-of-anscochrome/
or maybe The Cisco Kid syndrome:
But no, it appears that they were toned black and white photographs - I'll never understand why this was done.
I know we had filmstrips in school, sometimes projected for the whole class, sometimes with a viewer for a single student.
The film strips were 1/2 frame 35mm film - there was a legendary Swiss SLR camera, the Alpa that shot in the 1/2 frame format, would have been perfect for filmstrips of slide film. Also the equally legendary 1/2 frame Olympus Pen and Pen FT cameras.
Filmstrips probably should have been allowed to die :)
Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm