The Seiko 6139-7020 "Speed-Timer" is part of a pioneering chronograph lineage, released during the golden age of mechanical sports watches. This Japan Domestic Market (JDM) exclusive was equipped with the revolutionary Seiko Caliber 6139 - one of the world’s first automatic chronograph movements, introduced in 1969. Unlike its more commonly seen cousins (like the 6139-600X "Pogue"), the 7020 reference stood out with its sleeker, more minimalistic case design and distinctive dial layout. The "Speed-Timer" branding, reserved only for JDM models, underscored Seiko’s ambition to compete with Swiss chronographs in both performance and style. The version with a black dial and champagne subdial is particularly sought after among collectors for its rarity and dynamic aesthetic.
Specifications:
Reference: 6139-7020
Serial Number: 140XXX
Production Date: April 1971
Movement: Seiko 6139 automatic chronograph
Functions: Chronograph, inner rotating bezel, day-date with English/Kanji language
Case Material: Stainless steel
Case Diameter: 41 mm
Lug Width: 19 mm
Dial: Matte black with contrasting champagne subdial
Crystal: New, scratch-free acrylic
Bracelet: Original Seiko bracelet, fits up to approx. 18.5 cm wrist
Condition:
This vintage Seiko Speed-Timer is in beautiful, fully functional condition. The 6139 movement has been recently serviced and fitted with new gaskets, ensuring reliable performance. The chronograph starts, stops, and resets perfectly. The original dial and hands are exceptionally clean, maintaining strong detail. The case and bracelet show light signs of wear consistent with age but remain sharp and unpolished. The inner rotating bezel operates smoothly, and the day-date wheel features both English and Kanji options. The crystal is brand new and blemish-free.
