Corrected entry: When they are clipping her hair in WW2 at the farm, they start using electric clippers made in the 1960's. You can also see the cable in one shot. (00:06:07)
Hell Hath No Fury (2021)
1 corrected entry
Directed by: Jesse V. Johnson
Starring: Daniel Bernhardt, Timothy V. Murphy, Nina Bergman
Correction: The first electric clippers were invented in 1919, and of course they'd be powered by a cable. https://otcbeautymagazine.com/electric-hair-clippers/.