Re: 1970's black-and-white
@ Antron Argaiv; "5247 FTW -- slides *and* negatives. Oregon Labs IIRC."
Was that one of those companies that took Eastmancolor movie stock and packed and sold it for still photography use?
Seattle Filmworks "[sold] motion picture film that is processed using Kodak's ECN-2 process. The film was loaded into 35mm film canisters for still photography use. [..] Seattle FilmWorks also offered "prints and slides from the same roll", using cinema print film to create slides from the original negatives. These slides fade quickly when not properly stored, and are generally of inferior quality when compared to standard E6 or K-14 processed slides."