The Watch Site banner

7a28

  1. (SOLD) Seiko Rotating head Speedmaster, 7A28-7050, Dec. ‘82 - $550

    SEIKO & CITIZEN TRADING POST
    The 7A28 chronographs were Seiko’s top of the line sports watches during the 80s era, priced more expenisve than the Omega Speedmasters during that time. They were the 1st ever analogue display quartz chronographs, this is one of the early 7A28 quartz chronographs. Unique with this model is its...
  2. Vintage Seikos for sale ($225 for the remaining group; individual prices within)

    SEIKO & CITIZEN TRADING POST
    Vintage Seikos for sale - $150 for both I’ve got a small group of vintage Seikos up for grabs. All prices are shipped, CONUS. Happy to answer any questions; don’t hesitate to ask. — 6619-8290 - $150 This handsome fella has the vibe of an Omega Constellation with its fluted bezel. Keeps good...
  3. FS - Seiko Chronograph Quartz SPR027 Ref. 7a28-707A - us$150

    SEIKO & CITIZEN TRADING POST
    SOLD - Seiko Chronograph Quartz SPR027 Ref. 7a28-707A - us$140 Up for sale : - Seiko Chronograph ref. 7a28-707A - High Grade Movement cal.7a28 with 15 Jewels - All normal Condition - Full Link Bracelet - Hairy Scratch on crystal and case - Watch only - Unknown Service history and water...
  4. coil / stepper motor function in 7a28 and the like

    WATCHMAKING & TINKERING
    Attention quartz movement experts: what kind of signaling is coming from the chip on a 7a28 to drive each of the 4 trains? Is it just pulsing the coil in an alternating polarity to ratchet it forward one tick? I'm familiar with larger unipolar steppers like you'd have on a 3D printer, but was...
  5. FS: Seiko 7A28-7049 Quartz Chrono - $400 (Reduced)

    SEIKO & CITIZEN TRADING POST
    FS: SOLD Seiko 7A28-7049 Quartz Chrono - $350 obo Up for sale is a gorgeous Seiko 7A28-7049 quartz chronograph Sports 100. This watch is reminiscent of the classic Omega Speedmaster Professional. Black 39mm dial. Rotating click bezel. Includes original bracelet and Seiko-signed clasp. Will...
  6. WTB: Seiko 7A28-7020 / James Bond watch

    SEIKO & CITIZEN TRADING POST
    I am looking to buy a Seiko 7A28-7020/James Bond watch with the white dial. Please let me know if you have one for sale.
  7. WTB Link(s) or band for 7a28-7060 or 7a28-7069

    SEIKO & CITIZEN TRADING POST
    Recently bought a Seiko 7a28-7069 titanium sports 100, but unfortunately the band is one link too small and I am super bummed. Desperately in need of at least 1 link, or even a full band (b1094), for the titanium PVD bracelet that came on the 7a28-7060 or 7a28-7069 Thank you:D
  8. 7A28-7040 - A bag of wonders!

    WATCHMAKING & TINKERING
    Well, one wonder specifically. I had bought this 7A28 in "used condition, not running". Well- it DID run, after a fashion. Seconds did the battery-is-empty two-step, the big chrono hand went 'round, but the 1/10th hand did not at first, then it started and stopped... Minute counter did...
  9. 7A28-7000 "Aliens" - replacement pushers

    THE JAPANESE WATCH DISCUSSION FORUM
    Hi all - new to the boards and very quickly getting into the world of collectable watches... I bought a 7A28-7000 'Black Ripley' as an engagement gift for my (now) fiancee. She's over the moon with it and wears it every day, which I think is cool for something that she'll have forever a...
Top