FS: Seiko Blue 1976 Serviced Kanji JDM Automatic 6139-8040 Chronograph watch | WatchUSeek Watch Forums
![Perturbations and the act of observation: A Seiko 6139-8040 from November 1974 | Adventures in Amateur Watch Fettling Perturbations and the act of observation: A Seiko 6139-8040 from November 1974 | Adventures in Amateur Watch Fettling](https://adventuresinamateurwatchfettling.files.wordpress.com/2023/04/6139_8040.jpg)
Perturbations and the act of observation: A Seiko 6139-8040 from November 1974 | Adventures in Amateur Watch Fettling
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Seiko - Sports Speed-Timer Automatic Choronograph Men's Watch - 6139-8040 - Men - 1960-1969 at auction | LOT-ART
FS: Seiko Blue 1976 Serviced Kanji JDM Automatic 6139-8040 Chronograph watch | WatchUSeek Watch Forums
![699 USD] FS: Seiko Blue Speedtimer 1974 JDM Chronograph SERVICED 6139-8040 Chronograph Watch | WatchCharts 699 USD] FS: Seiko Blue Speedtimer 1974 JDM Chronograph SERVICED 6139-8040 Chronograph Watch | WatchCharts](https://cdn.watchcharts.com/listings/1d328dca-10de-4437-84da-ebcf39c80fb6.jpg)
699 USD] FS: Seiko Blue Speedtimer 1974 JDM Chronograph SERVICED 6139-8040 Chronograph Watch | WatchCharts
![Seiko 6139-8040 Speed-Timer Green Chronograph Automatic Cal... for $550 for sale from a Trusted Seller on Chrono24 Seiko 6139-8040 Speed-Timer Green Chronograph Automatic Cal... for $550 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/29384498-jjr548qrmyudpbu36xdm82c6-ExtraLarge.jpg)