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cosmotron

  1. Electric ― electronic ― electromechanical

    THE JAPANESE WATCH DISCUSSION FORUM
    Hamilton-Ricoh Electric ― Citizen X8 / Cosmotron / IC-12 ― Seiko EL-310, EL-320, EL-330, EL-370, Elnix ― Citizen Hisonic, GX Cosmotron ― this is the thread for those watches which are powered by electricity, but which use a mechanical timebase (balance-wheel or tuning-fork) which communicates...
  2. Citizen Cosmotron 7804 Electro-Mechanical - $100

    SEIKO & CITIZEN TRADING POST
    Citizen Cosmotron 7804 electro-mechanical from 1973. It's battery powered, but beats at a fast 36,000 bph giving the second hand a smooth sweep. - Kanji / English day wheel - Brilliant emerald green striped dial that looks like malachite - Wonderful mechanical ticking sound when you hold it up...
  3. FS : Vintage Citizen Cosmotron bracelet 18mm $55

    SEIKO & CITIZEN TRADING POST
    -Lug size : about 18mm -Straight end links -Lenght : about 15.5cm ( including deployment at the clasp ) Adjustable at the clasp about +5mm / -10mm -Condition : it is used but in good condition. Removable links are fixed and may not be removable due to age. Price : USD 55 ( included shipping...
  4. Newbie here, not elsewhere.

    THE JAPANESE WATCH DISCUSSION FORUM
    Hi all, You might know me from TWF, or from my own watch website that I won't be crude enough to plug on my first post! I have just picked up these two beauties. The first is a 1973 Seiko 6139-8010, and the second is a 1974 Cosmotron 60-5115. But they both need crystals and I am struggling...
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