Unlocking the True Potential of This Rare Notch-Resist Chronograph

In this video, we dive deep into the world of Seiko watches, exploring the unique challenge of their historically low amplitude, a characteristic that has always been a part of Seiko’s design. Our goal is to see if we can overcome this and make this Seiko rival, or even exceed, the performance of its Swiss counterparts. We focus on the rare 6139-6009 'Notch-Resist' model, produced only for a few months in 1970.
Through several repairs and upgrades, we aim to unlock its true potential, achieving performance that matches or surpasses it's Swiss counterparts. Join us as we push the boundaries of what this vintage Seiko can achieve!
Model: 6139-6009 'Notch-Resist'
Movement: 6139A
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