Seiko Hexagon, Ref. 6139-7080, Cal. 6139, Men’s Chronograph Vintage Watch, 1975

Vintage Seiko Hexagon Chronograph Vintage Watch from 1975, men's stainless steel automatic timepiece powered by the Japanese Cal. 6139 movement. Featuring a deep blue sunburst dial with a contrasting light blue tachymeter ring, this iconic model is fully serviced and for sale in excellent condition.

Seiko Hexagon 1975 — First impression - 6139-7080

The Seiko Hexagon Chronograph from 1975 stands out as a bold expression of 1970s Japanese horology heritage. With its distinctive hexagonal stainless steel case, integrated bracelet, and captivating dual-tone dial design, it remains a sought-after collectible among enthusiasts. Reference 6139-7080 combines sporty utility with refined vintage aesthetics, making it an enduring symbol of Seiko’s innovation in automatic chronograph engineering.

Seiko Hexagon - Deep Blue Sunburst Dial

The dial showcases a rich deep blue sunburst finish that shifts beautifully under the light, complemented by a light blue tachymeter track for enhanced legibility. Applied rectangular hour markers with luminous inserts and a clean minute track emphasize precision. The contrasting day-date display at 3 o’clock provides functionality while preserving visual balance.

Hexagon 6139-7080 - Hands

The watch features rectangular hour and minute hands with luminous centers for low-light visibility, paired with a vibrant orange chronograph seconds hand for clear timing readability. The sub-dial at 6 o’clock is dedicated to the 30-minute chronograph counter, maintaining the model’s symmetrical layout.

Seiko Hexagon 6139-7080 - Angular Stainless Steel Case

Measuring 40 mm in diameter and 42 mm lug-to-lug, the angular stainless steel case delivers a strong wrist presence. Its brushed top surface is contrasted by polished edges, a hallmark of Seiko’s case craftsmanship from the era. The geometric profile not only enhances aesthetics but also reinforces the watch’s robust sports tool identity.

Hexagon 6139-7080 - Crown

The recessed crown is positioned at approximately 3:45, a signature element of Seiko’s 6139 series, designed to avoid interference with chronograph operation. It appears original to the watch, with precise ridging for secure adjustment.

Seiko Hexagon Stainless Steel Bracelet

The integrated stainless steel bracelet features solid links with brushed upper surfaces and polished edges, delivering both comfort and durability. Its original Seiko clasp adds to the authenticity and completes the cohesive design.

Automatic Chronograph Caliber 6139 Movement

Inside beats Seiko’s Caliber 6139, an automatic chronograph movement operating at 21,600 bph with a column wheel and vertical clutch architecture. Introduced in 1969, it holds historical significance as one of the first automatic chronograph calibers in the world. Known for its durability and accuracy, it offers both quickset day and date functions, embodying the golden age of mechanical sports watches.

Heritage of the Seiko Hexagon in the 1970s Design Context

The Seiko Hexagon 6139-7080 captures the adventurous spirit of the 1970s with its geometric lines, integrated design, and technical mastery. This period saw Seiko pushing boundaries in automatic chronograph technology, securing its place alongside Swiss competitors. The combination of practical chronograph functions, bold case architecture, and vivid dial colors reflect the era’s fascination with futuristic, performance-oriented wristwatches.

Seiko Hexagon — 12 Months Warranty, Worldwide Shipping

This timepiece has been fully serviced, remains in full working order, and retains all original components. Backed by a 12-month warranty, it’s ready to be worn and enjoyed daily or preserved as a valuable collectible. We offer worldwide shipping and secure packaging for safe delivery to your doorstep.

Explore more Seiko vintage chronographs like this 1975 Hexagon Ref. 6139-7080 with Cal. 6139 or browse our chronograph vintage watch collection with rare 1970s automatic movements.