My 1971 Burroughs C3155 calculator. It was made before they decided on how digital number displays should look. That zero at the end is not a mistake.. That's actually how it's supposed
Sharp EL-307 | Old calculator, Pocket calculators, Slide rule
Retro calculator with VFD display from PulsarLabs on Tindie
Need help fixing a vintage VFD calculator - Displays “1” when pressing “7” : r/calculators