Seiko Grand Seiko Hi-Beat 36000 6146-8000 (1969)

Now available at auction from Second Vintage A highly sought-after 61GS featuring the iconic Taro Tanaka 'Grammar of Design' case and a 36,000 bph hi-beat movement. This 1969 example is prized by collectors for its sharp, well-preserved geometry, original GS-signed crown, and an exceptionally clean, vibrant silver sunburst dial. Brand: Seiko Model: GS Hi-Beat 36000 Reference Number: 6146-8000 Serial Number: 944138 Movement: Automatic, 25 Jewels Dial: Silver sunburst with applied indices Case Size: 37 mm (excluding the crown) Case Material: Stainless steel Production Year: 1969 Condition: Excellent vintage condition. Movement serviced on 23 September 2026. Timegrapher: +9+11s/day, performing remarkably well. Dial and Hands The exceptionally clean and vibrant original dial features a pristine silver sunburst finish offset by crisp black printing. The applied indices and logos remain clean and bright, showing no visible spotting, staining, or degradation. The dauphine hands, detailed with black center stripes, present clean polished surfaces with no visible oxidation or corrosion, matching the dial perfectly to complete the stunning original condition. The watch includes an English day and date display. Case and Crystal This well-preserved vintage stainless steel case displays strong original lines defined by the famous 'Grammar of Design' geometry, featuring distinct transitions between brushed and polished surfaces. The case exhibits light handling marks and superficial scratches consistent with careful wear. The smooth polished bezel shows light hairline scratches. Turning the watch over reveals the gold GS medallion on the caseback, which remains intact and well-preserved. The watch is fitted with a signed GS crown featuring crisp knurling, and the flat crystal is clear with no significant scratches, chips, or crazing visible. Movement Powering this watch is a high-beat 36,000 bph automatic caliber, adjusted to five positions. The movement displays clean plates and bridges with no visible corrosion or significant scratches, and the rotor is present and intact. Engravings read "SEIKO", "TWENTYFIVE 25 JEWELS", "FIVE 5 ADJUSTMENTS", and "084399". Exhibiting remarkable accuracy and consistency, performing brilliantly for a vintage timepiece. Timegrapher results show +9+11s/day. The movement was serviced on 23 September 2026. Strap The watch is paired with a black leather strap featuring an alligator and crocodile pattern. The strap appears lightly used and serves as a highly complementary addition to the watch. Condition Excellent vintage condition. The movement was serviced on 23 September 2026 and, supported by the recorded timegrapher result, is performing very strongly. The dial and hands are stunning, free of visible degradation or oxidation. The case retains sharp geometry and crisp brushed and polished finishes, with only light handling marks and superficial scratches observed. The gold caseback medallion is intact and well-preserved. Dimensions The case size is 37 mm, excluding the crown. Remarks This highly sought-after 61GS delivers an outstanding combination of pristine dial condition, sharp case geometry, and high-frequency mechanical performance. The intact gold caseback medallion and beautifully preserved hands make it an exceptionally appealing choice for dedicated collectors of vintage Japanese horology. History Introduced in the late 1960s, the 61GS series represents a significant era in Japanese watchmaking. It was the first automatic Grand Seiko to feature a 36,000 bph hi-beat movement, designed to offer superior precision and stability. The case architecture was heavily influenced by Taro Tanaka's design principles, which mandated flat surfaces and sharp, highly polished angles to reflect light brilliantly. Today, these models are celebrated for their technical achievement and distinct, uncompromising aesthetic that defined the brand's visual identity. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and securely packaged, then shipped with tracking and insurance for your peace of mind. We use fast express shipping, with typical delivery within 1–4 business days, depending on the destination. Please note that vintage watches may show minor signs of wear, aging, or imperfections, which are considered normal for watches of this age. We kindly ask you to review all photos carefully before bidding. We photograph each watch from multiple angles to provide the most accurate representation possible, and the photos form an important part of the description. The timegrapher assessment if provided is seen as an indication of the movement’s condition under fully wound testing conditions. As with all vintage watches, results may vary in daily use. If you have any concerns regarding functionality or defects after delivery, please contact us within 3 days of receiving the watch so we can assist you. As with all used watches, water resistance is not guaranteed. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: SEI-HXX-0002