Presented for auction by Second Vintage This exceptional timepiece represents a remarkable era in horological innovation, capturing the bold and dynamic design language of the 1970s. Vintage chronographs of this pedigree offer collectors a tangible connection to a time when mechanical ingenuity and striking aesthetics converged perfectly. With its robust proportions and unmistakable character, this watch stands as a testament to enduring craftsmanship and authentic, hard-earned patina. Brand: Seiko Model: Chronograph Reference Number: 6139-6005 Serial Number: 345808 Movement: Automatic Caliber 6139B Dial: Deep blue matte dial with creamy luminous indices, showing minor age-related spotting and dust Case Size: 41 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1973 Condition: Good vintage condition with characterful faded bezel and honest wear Dial and Hands The deep blue matte dial presents a highly attractive, functional layout characteristic of Seiko's golden era of chronographs. It features applied square hour markers filled with luminous material that has gracefully aged to a creamy eggshell tone. A framed day-date window sits prominently at the three o'clock position, while the thirty-minute chronograph sub-register occupies the six o'clock position. The dial exhibits minor signs of age, including faint spotting and light dust particles visible under close inspection, along with some subtle surface wear. The inner rotating indicator ring is rendered in a contrasting yellow hue, adding a vibrant touch to the overall composition. The steel baton hands retain their matching luminous fills but display noticeable surface oxidation and age-related texturing. The vibrant red central chronograph sweep hand and the matching sub-register hand provide excellent contrast against the dark dial surface. Case and Crystal The robust stainless steel cushion case retains its strong factory lines, showcasing a beautiful transition between the brushed upper surfaces and the polished flanks. The case exhibits normal, honest signs of wear consistent with its age, including superficial scratches and minor handling marks, but remains structurally sharp. The standout feature is the fixed external tachymeter bezel in the iconic red and blue configuration. The bezel insert displays significant and highly attractive fading, with the red portion having oxidized to a soft copper-pink and the blue section showing distinct edge wear and surface scratches, giving the watch a tremendous amount of authentic vintage character. The flat crystal sits flush with the bezel and shows light surface scratches and minor wear marks upon close examination. Movement Powering this timepiece is the legendary Seiko caliber 6139B, a 17-jewel automatic chronograph movement. Visually inspected, the movement appears remarkably clean, with the rotor and bridges retaining their factory finish and clear engraved text. The caliber 6139 is historically significant as one of the world's first automatic chronograph movements, featuring a column wheel and vertical clutch architecture. Running in vintage operational condition. Maintains the authentic mechanical character of the era, recording +70 to +73 seconds per day. Strap The watch is fitted with an original Seiko stainless steel H-link bracelet, a highly sought-after component that completes the authentic aesthetic of this model. The folded links show expected stretch and wear from decades of use, complementing the overall condition of the watch case. The folding clasp is deeply stamped with the Seiko signature and functions securely. Condition This timepiece is presented in good vintage condition. It displays normal vintage wear, a moderately patinated and faded bezel, and a well-defined case profile. The dial remains highly attractive despite minor age-related spotting, and the hands show honest oxidation. The case and bracelet exhibit surface scratches commensurate with regular, careful use over the decades. The heavily faded tachymeter bezel insert is a testament to its history and adds significant collector appeal. Dimensions Case Size: 41 mm (excluding the crown) Wrist Size: 17.5 cm Remarks This chronograph is a superb example of an honest, unpolished vintage tool watch. The combination of the deep blue dial, the yellow inner ring, and the beautifully faded external bezel creates a striking visual presence on the wrist. It represents an excellent opportunity for collectors to acquire a historically important automatic chronograph with genuine visual character. History Introduced in 1969, the Seiko caliber 6139 holds a pivotal place in horological history as one of the first automatic chronograph movements ever brought to market. Characterized by its robust column-wheel mechanism and vertical clutch, it set a standard for reliability and performance. The 6139 series gained legendary status not only for its technical achievements but also for its association with space exploration, famously worn by astronauts during the Skylab missions. Today, these chronographs are celebrated by enthusiasts worldwide for their bold design language, vibrant color palettes, and undeniable historical significance. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and very securely packaged, and shipped with tracking and insurance for your peace of mind. We ship via fast express service, with typical delivery in 1–4 business days (destination dependent). Note that with vintage watches, minor signs of wear, aging, or imperfections may be present and are considered normal for watches of this age. Please review all photos carefully before bidding. We strive to photograph each watch from multiple angles for the most accurate representation. The photos form an important part of the description. If there are any concerns of functionality or defects after delivery, make sure to contact us within 3 days of receiving the watch so we can assist you. As with all vintage watches, water resistance is not guaranteed. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: SEI-SCA-0001