This is episode 1 of 3.
Episode 2:    • LCD Explained (and more)  
Episode 3:    • Strange Color LCD's  

Check the album LCD here:
Bandcamp: https://posy.bandcamp.com/album/lcd
Spotify: linkspotify:album:4SOUwRczibi7WGcjhQMhPF
Apple Music: https://music.apple.com/nl/album/lcd/...
NO LOUDNESS WAR: Turn off auto volume and turn up the playback volume!

Please note: Footage is copyrighted

Useful links:
George Heilmeier in action (at 21:09):    • Liquid Crystal Display History  Film ...  
https://spectrum.ieee.org/static/time...
http://www.vintagecalculators.com/htm...
http://www.crazywatches.pl/lcd,1

Special thanks to Martijn van der Veur (misspelled in video) for letting me film his watch, and also hinting the DSM LCD calculator.
Also thanks to Nigel from vintagecalculators.com for his helpful response and very informative website.