Seiko - Grand Seiko Hi-Beat - 5646-7010 - Men - 1971

Presented for auction by Second Vintage Discover a beautiful piece of Japanese horological history with this classic 1970s Grand Seiko. The 56GS series represents a golden era of Seiko's watchmaking, renowned for its highly accurate Hi-Beat movements and timeless Grammar of Design aesthetics. This particular example features a beautifully preserved sunburst silver dial and an exceptionally crisp gold GS medallion on the caseback, making it a highly desirable acquisition for any serious collector looking for an iconic vintage dress watch. Brand: Seiko Model: Grand Seiko Hi-Beat Reference Number: 5646-7010 Serial Number: 1N0058 Movement: Automatic Caliber 5646A with 25 jewels Dial: Silver sunburst with applied indices and Suwa factory logo Case Size: 36 mm Case Material: Stainless Steel Production Year: 1971 Condition: Stunning vintage condition. Timegrapher indicates +25 to +27 seconds per day. Which indicates healthy movement. Dial and Hands The dial presents a striking silver sunburst finish that catches the light beautifully, showcasing exceptional preservation with minimal signs of aging. It features sharply polished applied hour markers with black center stripes that perfectly match the elegant dauphine hands. The applied Seiko and GS logos sit proudly on the dial, complemented by the crisp Hi-Beat and Suwa Seikosha factory markings above the six o'clock position. A framed day and date window at three o'clock provides added functionality, displaying both English and Kanji character options. Case and Crystal The stainless steel case retains Seiko's legendary Grammar of Design lines with defined facets and sharp, sweeping lugs. It shows light and honest vintage wear with minor handling marks, but nothing that detracts from its highly attractive overall presentation. The original GS signed crown operates smoothly. Flipping the watch over reveals a solid screw down caseback featuring a completely intact and exceptionally crisp gold Grand Seiko medallion, a detail highly prized by collectors. The crystal is clear and well preserved, offering an unobstructed view of the stunning dial. Movement Inside beats the revered Seiko automatic caliber 5646A, a highly respected 25 jewel Hi-Beat movement known for its smooth sweep and precise engineering. The movement components appear clean and visually well maintained, reflecting the outstanding quality of vintage Grand Seiko calibers. Timegrapher readings show the watch running at +25 to +27 seconds per day. Which indicates healthy movement offering reliable vintage performance. Strap The watch is fitted with an elegant black leather strap featuring contrasting white stitching, pairing beautifully with the silver dial and stainless steel case. The strap is supple, showing gentle wear, and secures with a classic steel tang buckle. Condition This watch is presented in stunning vintage condition. The dial appears near flawless with exceptional preservation and no visible staining or damage. Minimal wear is visible on the case with only very minor handling marks, while the case lines remain beautifully defined. The gold caseback medallion is extraordinarily well preserved, further elevating the overall strong and fresh appearance of this timeless piece. Dimensions The classic case measures 36 mm in diameter excluding the crown, offering a perfectly proportioned and comfortable presence on the wrist that suits a wide variety of sizes. Remarks The 56GS is a cornerstone of any serious vintage Seiko collection. Finding an example from 1971 with such a pristine gold caseback medallion and immaculate dial is becoming increasingly rare. Its blend of high frequency precision, iconic case geometry, and daily wearability makes it a standout piece for both dedicated collectors and those appreciating refined vintage design. History Introduced in the late 1960s and produced into the 1970s, the 56GS series was the final generation of vintage Grand Seiko mechanical watches before the quartz crisis fully took hold. Manufactured by the Suwa Seikosha division, the 5600 series movements were designed to offer high beat accuracy while being slightly thinner than their predecessors, allowing for more elegant and refined case profiles. These watches encapsulate the pinnacle of Seiko's mechanical era, built to rival the finest Swiss chronometers of the day, and they continue to be celebrated worldwide for their enduring beauty and robust engineering. / Second Vintage SKU: SEI-SGH-0004