Lot Of 21 technicolor super 8 film Cartridges, High School Science Subjects

Description

Lot Of 21 technicolor super 8 film Cartridges, High School Science Subjects. Shipped with USPS Priority Mail.
Lot of 21 film reels.
All science subjects.
In original hard plastic case, case is 4x4.5 inches with film loop that fits inside
Made in USA
once used in a now shuttered high school science lab, clean cartridge and inside of case.
Technicolor Super Eight
All videos around 2-4 minutes long
I am not certain of the functionality of this film loop as I do not have the projector to play it. It appears to be in good condition and stored in its protective case.
Made by The Ealing Corporation and others made by The National Film Board of Canada
1960s and 1970s