Presented for auction by Second Vintage A highly attractive Seikomatic Weekdater featuring the sought-after 6 o'clock day display. This 1966 example presents a beautifully preserved silver sunburst dial paired with an elegant fluted bezel and a hidden crown design, highlighting a classic era of Seiko design and robust mechanical engineering. Brand: Seiko Model: Seikomatic Reference Number: 6206-8100 Serial Number: 6408350 Movement: Automatic, caliber 6206B, 26 jewels Dial: Silver sunburst with day at 6 o'clock and date at 3 o'clock Case Size: 37 mm (excluding the crown) Case Material: Gold-plated Production Year: 1966 Condition: Good vintage condition. Timegrapher: +50+53s/day, running in operational condition. Dial and Hands The silver sunburst dial is exceptionally clean and attractive, remaining very well-preserved. Applied gold-tone indices are crisp, while the printed text is sharp and fully intact. The distinctive day window at 6 o'clock and the date window at 3 o'clock are clean, displaying clear typography. The original gold-tone dauphine hands show expected age-related oxidation and minor spotting on their surfaces, with no significant deformation. Case and Crystal The gold-plated case displays honest vintage wear while preserving its overall geometry. It shows moderate surface scratches and handling wear, along with visible plating wear on the lug edges and case flanks. The gold-tone fluted bezel exhibits light scratches and minor softening of the fluted edges from use. At 4 o'clock, the recessed hidden crown shows some plating wear. The caseback features a clear dolphin motif and an SGP marking. A domed acrylic crystal provides a distortion-free view of the dial, remaining clear with no major scratches, cracks, or crazing visible. Movement Inside is the Seiko automatic caliber 6206B, featuring 26 jewels. The gold-tone movement plates and rotor are very clean, showing no visible corrosion, oxidation, or significant scratches. The screws and jewels appear in good condition, and the engravings reading Seiko, 26 Jewels, Japan, and 6206B are clearly visible. The timegrapher records +50+53s/day. Running in operational condition. Maintains the authentic mechanical character of the watch. Strap The watch is fitted with a complementary black leather strap featuring contrasting yellow stitching. It shows light wear and creasing. Condition Good vintage condition. The dial is exceptionally clean and attractive, while the original hands display expected age-related oxidation and minor spotting. The gold-plated case retains its overall geometry, presenting honest vintage wear with moderate surface scratches and plating wear on the lugs, case flanks, and recessed crown. The fluted bezel shows minor softening of its edges. The domed acrylic crystal is clear and well-preserved. The automatic movement is visually clean and running in operational condition. Dimensions The case measures 37 mm (excluding the crown). Remarks This Seikomatic Weekdater is a highly attractive timepiece featuring a sought-after 6 o'clock day display. The beautifully preserved silver sunburst dial and classic dolphin motif caseback make this a compelling choice for collectors of 1960s Japanese horology. History The Seikomatic Weekdater represents a celebrated era of Seiko design from the 1960s. Known for introducing the distinctive 6 o'clock day window configuration, this model line became a collector favourite due to its unique dial layout and robust automatic movements. The combination of an elegant fluted bezel, a hidden crown, and dependable mechanics highlights Seiko's dedication to both aesthetic refinement and everyday utility during this classic period. 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-MJX-0012