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  1. Seiko & Citizen Trading Post
    Hi All, For sale is this mint condition NOS Citizen Cosmotron 7804 Electro-Mechanical from 1975.It still has the original hang tag on it and the plastic crown clip that keeps it locked in hacking position. This is gorgeous and under-rated watch and they rarely show up in this condition. The...
  2. Watchmaking & Tinkering
    Anyone experienced with cosmotron movements willing to take my Citizen 7800 - 870026 for a service? Please pm me, thank you! (Preferably EU & UK )
  3. 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...
  4. 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...
  5. 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...
  6. 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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