One of the latest purchases I made was a Mamiya 16 Automatic (the Revue rebranded, destined to the W. German market). In the camera there was a small length of 16mm double perforated film, which was shot and forgotten in the take up spool, God knows since when.
Processed in Rodinal at 1+50, 20*C, on a 16mm dev. reel, these are scanned negative frames.
No idea who these persons are, but it would appear that the times are late 70’s or start of the 80’s, looking at clothing, hairdo, and so forth.