Alfo PR-P 100 126 film, expiration date 1990-2. I found two of these cassettes in a second-hand store in Arnhem (NL). According to the owner, these films had been lying there for years, so no cool storage.
The shots were taken with a second-hand (or third- or fourth-) Kodak Instamatic 155X on a sunny day and the rolls were developed in standard C-41, homebrew. Oh, the boxes say “Möglichst bald entwickeln” (Process ASAP). Did that.