The Seiko 6139-7020 is part of Seiko’s iconic 6139 chronograph series, which made history as one of the world’s first automatic chronographs. This particular model, produced in May 1972, was made for the Japanese Domestic Market (JDM) and features the legendary Seiko 6139 movement, known for its column-wheel chronograph system and smooth operation. With its champagne sunburst dial contrasted by a black subdial, an internal rotating bezel, and a robust 41mm stainless steel case, this is a true vintage collector’s piece.
Specifications
Reference Number: 6139-7020
Serial Number: 251XXX
Production Year: May 1972
Movement: Seiko 6139 Automatic Chronograph – Column-wheel system
Case: Stainless steel, unpolished
Case Diameter: 41 mm
Lug Width: 19 mm
Dial: Champagne sunburst with black subdial
Crystal: Original, polished
Bracelet: Original stainless steel bracelet, fits up to 18 cm wrist
Bezel: Internal rotating bezel
Date Display: Kanji/English day-wheel
Box & Papers: Not included
Condition
This Seiko 6139-7020 has been recently serviced, ensuring all functions operate smoothly. It has new gaskets for added reliability. The case and bracelet remain unpolished, showcasing normal wear and patina from age, while the original crystal has been polished for better clarity. The dial and hands are in excellent condition, and the internal rotating bezel functions properly.
