Seiko Chronograph Automatic

SEIKO Chronograph Automatic watch ref. 6139-6012 Serial number: 1819XX. Year 1971.
Stainless steel case with sporty and robust design, with pushers and crown integrated in the case. Black dial with tachymeter scale on the inner bezel, cream 30-minute subdial at 6 o'clock and orange central seconds hand for the chronograph function. Applied indexes with luminescent material and silver-tone hands with white accents. Day and date window located at 3 o'clock with quick adjustment. Acrylic crystal. Seiko Caliber 6139 automatic movement, one of the first automatic chronographs in history, with column wheel and vertical clutch. Original steel bracelet with pierced link design and deployment clasp. It works.
Measurements: 39 mm (dial diameter); 43 x 40 mm (total case with crown).

The Seiko 6139-6012 is part of the iconic Seiko 6139 chronograph family, which revolutionized the world of watchmaking in 1969 by being one of the first automatic chronographs produced in series. This model stands out for its sporty design and advanced functionality, being a highly appreciated piece by collectors and vintage watch enthusiasts. It can be considered a watch with a good combination of history, design and innovative technology.