This was my first Cosmotron, and was almost a ‘just curious’ buy. But as soon as I received it I was rather hooked and I have bought a few more since. I’ll be doing an article on the Cosmotrons in due course, so not too much technical information here for now – enough to say that these are ‘hybrid’ electro-mechanical movements, and Citizen was the first company to make them for the Japanese market in 1966, see here: https://sweep-hand.org/2011/07/11/this-weeks-featured-watch-10-the-electric-watch/
The first models ran at 18,000 beats per hour, but this soon increased as the movements were updated, and the 7806 runs at a smooth 36,000 beats per hour, whilst the speed reached 43,200 beats per hour in the 5800, see here: https://sweep-hand.org/2011/09/21/this-weeks-featured-watch-14-the-cosmotron-5800/
Fancy dials and faceted crystals are seen on a number of the later Cosmotrons, but this one is a simple design, giving it a timeless quality in my view:
The white dial carries the usual applied Citizen logo, with printed ‘electronic’ and ‘cosmotron’ logos and the applied Cosmotron symbol:
Some nice finishing on the day / date window frame and a smart hand set:
The movement, with battery & electronics instead of mainspring, with relatively conventional hairspring and balance (with fine adjuster):
Although the expected battery life was only about 12 months, mine has been running now for at least 21 months, and keeps very good time.