140 - The Seiko SpeedTimer, model 6139-6000, is an automatic chronograph from the 1960s that embodies the Japanese watchmaking philosophy at the dawn of the space age. This 1969 model features a distinctive blue dial with luminescent hour markers, a rare combination characteristic of its generation. The Seiko 6139A movement ensures reliable and consistent automatic winding. The 41 mm stainless steel case, 12.9 mm thick, has the generous proportions typical of vintage sports watches. The mineral crystal complements the clean design, while the vintage steel bracelet, complete with its original folding clasp, remains intact on this piece. The watch is water-resistant to 30 meters, in line with the standards of the era.The blue dial reveals normal signs of aging: the visible marks on the crystal, bezel, and case tell the story of fifty years of use. The luminescent hands and hour markers retain their patina. The watch underwent internal servicing in March 2026.Equipped with a chronograph, day-date display, and tachymeter, this SpeedTimer remains a fully-fledged sports watch. Sold on its own, without a box or original paperwork, it will appeal to collectors of vintage chronographs seeking authentic Japanese craftsmanship.