I recently had the opportunity to expose a roll of Agfa Isopan ISS which expired in 1974.
The Isopan ISS is a 100 ASA film, and in this instance was rolled onto a spool intended for 127-format cameras.
The exposures of 127 film are 4 cm wide. I used my Yashica 44 to make 4x4 cm size photographs.
I gave the film two stops extra light, since it is so old, hence measured for 25 ASA.
As always, using the Yashica 44, the experience was very satisfying. Now, seeing the photos, I am truly humbled by this old film.
I did not have to do any major editing to get these wonderful exposures out of the negatives, using my Canon 9000F Mark II scanner. I only added some contrast.