Cosmotron is Citizen's reply to ESA's Dynotron - the first transistored electro-balance mechanical watches of the late 60's - often marketed as Swissonic.
here is a perfect website focused on electric watches:
http://www.electric-watches.co.uk/make/ ... itizen.php
pictures courtesy of Paul, the owner of Electrical Watches, shown for reference.
his website is awesome!!!!