Pathé KOK: 35mm vs. 28mm

A comparison of early 28mm and 35mm Pathé KOK home cinema projectors and speculation about which came first. Because even the Pathé archives have no documentation of and information about 35mm Pathé KOKs, speculation is all that's left. So please see this as the opinion piece that it is.
0:00 TL;DR, Recap and Overview
2:24 Serial Numbers
5:07 Mechanics
6:47 Conclusion
10:25 Hypothesis
Links
Filmmuseum Düsseldorf:
www.duesseldorf.de/filmmuseum
Technical Museum Stockholm:
www.tekniskamuseet.se/en/
Pictures of 35mm Pathé KOK #306:
www.deutsche-digitale-bibliot...
Pictures of 35mm Pathé KOK #12:
digitaltmuseum.se/02102630418...
Pictures of 35mm Pathé KOK with unknown serial number:
digitaltmuseum.se/02102630491...
Jérôme Seydoux-Pathé Foundation:
pathe.com/en/jerome-seydoux-p...
Comparative study of 28mm projectors and cameras by Anne Gourdet-Marès of the Jérôme Seydoux-Pathé Foundation (in French):
• Communication Anne Gou...
After butchering Technology Connections' tagline ("...through the magic of buying two of them") it's only fair to link to his channel. If you like this video, you'll like his even more:
/ @technologyconnections
I mean, I don't own a toaster and don't care for them but his 20-minute video about an ancient one made me want to own it...
• The Antique Toaster th...

[@elcinedeantes2302]

Tengo en mi colección de proyectores un simplex apogee 35 mm, Bell & Howell 16 mm, Kalart victor 16 mm, Elmo super 8 mm and Royal bipasso 8 mm