A friend has given me five rolls of "Sears color movie film." They are 8mm-film in 25-foot rolls. They expired July 1973 and were manufactured in the USA though I don't know by which manufacturer. The film was originally rated ASA40 (daylight). Nowhere in the packaging is a process listed (like E-6 or E-4, etc.) but it seems to me that 1973 (thus a manufacturing date of about 1971) may be too early for E-6.
Does anyone know this Sears film and how it would respond to 45-years-late cross-processing? Or exactly what kind of film it was back then?
I am probably going to give most of it away to someone locally who uses 8mm movie film. But I may save a bit for use in one of my smaller still cameras and then develop it as b&w. I have developed C22 stuff as b&w, but have no idea what E-4 might do.
And, at an original speed of only 40, my over-exposures will have to be pretty slow. . .