This is a fully original Seiko 6139-6012 chronograph, manufactured in November 1971, with no aftermarket parts. It features a black dial, a red big second hand, and original illumination with patina. Housed in a stainless steel case measuring 39 by 43mm, the watch is powered by the renowned Seiko caliber 6139 automatic movement. It has been fully serviced and is in excellent working condition, with every function performing perfectly. All components, including the dial, are authentic. Comes with a 1-year warranty. Worldwide shipping is available.
Introduced in 1969, the Seiko 6139 is a mechanical automatic chronograph movement, a historic milestone for Seiko as their first chronograph and one of the earliest automatic chronograph movements worldwide.
The 6139 movement features a column-wheel design, prized for its smooth operation and precise timekeeping. Its 17-jewel construction incorporates synthetic gemstones strategically placed to minimize friction and enhance durability. The movement also offers a quick-set day and date function for convenient calendar adjustments.
Operating at 21,600 vibrations per hour, the Seiko 6139 provides a power reserve of approximately 45 hours. Its vertical clutch system allows the chronograph to engage without causing additional wear on the movement, ensuring lasting reliability.