EU-based professional seller — no import taxes for EU buyers. Get your hands on this vintage 1965 Seikomatic "Weekdater" 6206-8100 with serviced 26-jewel automatic movement. New crystal, full weekday display, and dolphin caseback. A classic mid-60s Seiko in very good condition. Model History: The Seikomatic Weekdater series, introduced in the mid-1960s, was part of Seiko's ambition to produce high-quality automatic watches with calendar complications at an affordable price. The 6206-8100 model, manufactured in September 1965, featured both day and date displays—an advanced feature for its time. Powered by the 26-jewel Caliber 6206, it was one of the earliest Seiko movements to integrate a full weekday window at 6 o’clock alongside the date at 3. These watches were often recognized by their elegant proportions, dolphin caseback motif, and durable build quality, targeted at Japan’s growing professional class. Specifications: • Brand: Seiko • Model: Seikomatic • Reference number: 6206-8100 • Serial number: 5936905 • Caliber: Seiko 6206 – automatic, 26 jewels, day-date (English) • Case material: Stainless steel • Case diameter: approx. 37 mm • Lug-to-lug: approx. 44 mm • Lug width: 19 mm • Dial: Silver sunburst • Crystal: New, scratch-free • Strap: New black leather strap Condition: The silver sunburst dial iis well-preserved, showing only light patina, mostly visible under strong light. The stainless-steel case retains its original shape, showing some wear and surface marks from regular use, particularly around the bezel edge, but with no structural damage. A new, scratch-free crystal has been fitted. The movement has been serviced and all functions operate correctly, including smooth day and date changes. Fitted with a new leather strap. No box or papers. Includes a 3-month warranty on proper functionality. I aim to capture the condition of the watch accurately. Please make sure to review the pictures closely before bidding. The watch has been completely serviced by a professional watchmaker and tested for full functionality. The water resistance of the watch cannot be guaranteed. Shipping from Budapest, Hungary with tracking and insurance. If you have any questions or need support after your purchase, please do not hesitate to contact me. Thank you for condisering this timeless piece, and happy collecting! - SpecialTimer