This is the Dark Ages method of reviewing images. The blank space in the third row is my way of marking the middle of the roll (for stacking slides evenly on both sides of a cardboard storage box).
A very familiar sight.
I'm taking pix of my slides now on a box much like this.
I have some very great analog camera's like the Eos 1n hs, A Mamiya RB67, A Fujinon GX68, a Cambo thechnical camera, they are just gathering dust and losing value.
I also have a lot of over-date films which I better take to the chemical dump.
Ain't it a bitch.