My guess is it is a creative one-off(Frankenstein), built from a mechanical watch case with the correct size back for the back, a "Mc-Gyvered" button, generic red crystal.

HArd to get excited over a claimed portotype, with no documentation or other points of reference. I'd agree with the "butt ugly" contingent.
Howard Reihl seemed to think the cache of Synchronars the seller has were part of a trunkful of stuff spirited(stolen) away from his father shortly before his death. Who knows?
The seller is Pete Formanek,previously "led-land". Pete has voluntarily left here after I revealed that an auction site he was referring people to was really HIS site, and he had access to everything from user names to passwords and high bids. Those who use the same password for many sites were understandably a bit alarmed at that thought.

http://www.retroleds.com -
Sales of vintage LED, LCD, analog watches,
parts and gadgets -
repair tutorials & tips
Nov. 2022 - back in business!! BItter divorce is in home stretch, come grabs some great deals, I had to open the safe . . . damn attorneys. piss.