1970s Citizen Cosmotron

This is a lovely example of a Citizen Cosmotron lovingly restored my me to bring it back to life and to show off that absolutely stunning dial!

The Cosmotron were out at the same time as the very first quartz watches,  the movement in this one is a 7804. It is a machanical movement with a balance wheel but instead of a mainspring and barrel it has a battery. The battery goes though a circuit with a transistor to a coil. The coil is sandwiched between two wheels on the balance wheel, one wheel has magnets on them  (yes magnets in a mechanical watch!) the coil pulses with the current and the magnets are opposite poles which makes the balance swing. The movement of the balance then transfers its power down the train of wheels, eventually to the hands, in effect moving the opposite way to any conventional mechanical watch which goes from mainspring to balance wheel.  This regulated pulse makes the watch run efficiently and more accurately.  Also gives a sweep second.  The joy of these is you can take them off for weeks at a time and they will just keep going, ever ready to wear! 

I have fully stripped down the movement, inspected every component, cleaned and serviced and it is now running very well. 
Case and bracelet have been cleaned and sterilised.  A light polish to the case and some re-brushing to the bracelet and end links. Original crystal has been refinished too.  This watch has had the works!  New gaskets to keep it as safe as possible.  Please do not bathe or swim with this watch as it would void any warranty. 

Please note that i have this watch on the last hole in the clasp ladder and my wrist is 7" so on its maximum.  If you are bigger or want a much looser fit then either an extender or a strap is a better option for this watch. 

Dimensions.

Case Diameter 38mm 

Thickness 12.20mm 

Lug Width 18mm 

Lug to Lug 41.5mm 

Please look at all photos and videos in this listing to aid with any purchase decision. US buyers, Tariff should show in checkout.  Being Japanese it would be 15%