Seiko - Grand Seiko - No reserve price - 5645-7010 - Men - 1971

Available now on auction by Second Vintage This distinguished Grand Seiko exemplifies the peak of Japanese horological precision and design philosophy from the early 1970s. Showcasing the iconic "Grammar of Design" principles established by Taro Tanaka, this timepiece features a beautifully preserved silver sunburst dial and the renowned high-beat automatic movement. It represents a significant era when Grand Seiko was proving its capability to match and exceed the world's finest chronometers, making it a highly desirable piece for collectors of significant vintage Japanese watchmaking. Brand: Seiko Model: Grand Seiko Reference Number: 5645-7010 Serial Number: 101168 Movement: Caliber 5645A, 25 Jewels, Automatic Dial: Silver sunburst with applied indices, showing minor signs of age Case Size: 36 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1971 Condition: Good vintage condition with honest signs of wear Dial and Hands The silver sunburst dial is a classic expression of Grand Seiko's refined aesthetic. It features applied, multi-faceted baton indices with black central inserts that catch the light beautifully, matching the polished dauphine hands. The typography is crisp, with the "SEIKO" and "GS" logos applied, while "AUTOMATIC" and "HI-BEAT" are finely printed. A framed date window sits at the three o'clock position. The dial shows minor signs of age, including some light spotting and small marks around the periphery and near the center, which are consistent with its vintage nature. The hands retain their sharp edges and polished finish, though they exhibit subtle oxidation upon close inspection. Case and Crystal The 36mm stainless steel case showcases the sharp, angular lines characteristic of Grand Seiko's design language, with flat brushed surfaces contrasting against polished flanks. The case exhibits honest signs of wear, including superficial scratches and minor dings, particularly on the polished bezel and lug edges, indicating a life of regular use. The original GS-signed crown is present and well-preserved. The crystal is clear, allowing an unobstructed view of the dial, though it shows some micro-scratches typical of normal wear. The caseback features the iconic gold Grand Seiko medallion, which remains in excellent condition with crisp detailing, surrounded by the engraved serial and reference numbers. Movement Powering this timepiece is the esteemed Grand Seiko Caliber 5645A, a 25-jewel automatic movement known for its high-beat frequency and exceptional accuracy. The movement is visibly clean, with the rotor and bridges showing fine brushing. Engravings on the movement clearly indicate "ADJ. 5 POS. TEMP." and "25 JEWELS JAPAN 5645 A". The movement serial number 176738 is also distinctly visible. Running in vintage operational condition. Maintains the authentic mechanical character of the era. Timegrapher results show +40 to +45 s/d. Strap The watch is fitted with a vintage-style black leather strap featuring contrasting white stitching, complementing the classic look of the timepiece. The strap appears lightly worn and remains supple, ready for immediate wear. Condition This Grand Seiko is in good vintage condition overall. The case retains its fundamental geometry despite showing signs of regular wear, and the gold medallion on the caseback is remarkably well-preserved. The dial exhibits some age-related spotting, adding character without detracting significantly from its legibility or charm. The movement is clean and operational, representing a solid example of vintage Grand Seiko engineering. Dimensions The case measures 36 mm in diameter, excluding the crown. Remarks This reference 5645-7010 is a quintessential example of Grand Seiko's golden era, offering a harmonious blend of sharp design and mechanical sophistication. It stands as a testament to Seiko's dedication to creating the ideal everyday watch, combining durability with understated elegance. History Introduced in the late 1960s and early 1970s, the 56GS series was one of the last mechanical Grand Seiko lines before the quartz crisis fully took hold. Designed to be thinner and more refined than its predecessors, the 56GS utilized automated production techniques while maintaining the strict chronometer standards Grand Seiko was famous for. The "Grammar of Design" rules dictated its highly polished, flat surfaces and sharp angles, intended to sparkle brilliantly on the wrist. Today, these models are celebrated by collectors as the culmination of vintage Grand Seiko's mechanical achievements. / Second Vintage SKU: SEI-SGH-0006