Brilliant thread!! Thanks!
I remember the Agema 570. At the time, arguably the most popular PM camera of its time. In one of the pics, the FPA number was 1700 something. A petty big number (serial) for its time.
Fraser, when you come back, do you remember what FPA is in that camera? There weren’t that many choices back then. I almost want to say it was an original Boeing bolometer. If I could see it, I think I could confirm that. All this predates Ulis (Sofradir uncooled.)