Available now on auction by Second Vintage A beautiful representation of mid-century Japanese horology, this Seiko Seikomatic Weekdater reference 6218-8970 offers a compelling blend of elegance and mechanical sophistication. First introduced in the 1960s, the Weekdater series became highly regarded for its distinctive day display at the six o'clock position and precise automatic movements. This particular example from 1964 features a classic silver sunburst dial accented by gold-tone indices and hands, creating a warm, luxurious contrast against the robust stainless steel case. Powered by the high-jeweled caliber 6218A, this piece encapsulates the golden era of Seiko's mechanical watchmaking, appealing strongly to collectors who appreciate historic design and enduring quality. Brand: Seiko Model: Seikomatic Weekdater Reference Number: 6218-8970 Serial Number: 4705177 Movement: Automatic caliber 6218A, 35 Jewels Dial: Silver sunburst with gold-tone indices and hands, day and date displays Case Size: 36 mm (excluding the crown) Case Material: Stainless steel Production Year: 1964 Condition: Good vintage condition. Timegrapher results show -5 to -10 seconds per day with strong amplitude Dial and Hands The silver sunburst dial presents an elegant backdrop for the striking gold-tone applied indices and matching dauphine hands. To offer an honest assessment, the dial and hands exhibit a noticeable vintage character, showing subtle signs of age and light patina upon close inspection, particularly minor spotting on the handset and index facets, which adds to its authentic historic charm. The signature day window is prominently positioned at six o'clock, displaying the day in full, balanced by the framed date window at three o'clock. The crisp text and clean outer minute track remain highly legible. Case and Crystal The 36 mm stainless steel case retains its classic proportions and sharp, faceted lug profile characteristic of Seiko's iconic mid-century design language. It shows visible surface wear and scratches consistent with its age, reflecting an honest history of use. The caseback displays evident wear with surface marks, though the distinct Seiko dolphin emblem and factory engravings, including the reference and serial numbers, remain visible. The crystal is well-preserved, offering an unobstructed and clear view of the dial with minimal signs of handling. Movement At the heart of this timepiece beats the Seiko automatic caliber 6218A, a sophisticated 35-jewel movement renowned for its smooth operation and reliability. The movement presents beautifully, with its cleanly finished rotor and bridges visible when the caseback is removed. According to the provided timegrapher results, the watch is running at -5 to -10 seconds per day with strong amplitude, which indicates a healthy movement offering reliable vintage performance. Strap The watch is fitted with a black textured leather strap featuring contrasting yellow stitching, adding a subtle touch of sporty character that perfectly complements the rich tones of the dial accents. The strap is in excellent condition, supple, and ready for immediate wear. Condition Good vintage condition. The watch shows normal vintage wear with visible surface scratches on the case and caseback. The dial and hands present attractively but display honest aging and light patina consistent with a carefully worn piece from the 1960s. The movement is performing excellently, showing a strong timegrapher result of -5 to -10 seconds per day with strong amplitude, which indicates a healthy movement. Dimensions Case Size: 36 mm (excluding the crown) Remarks The Seikomatic Weekdater series is celebrated for its unique dial layout and technical refinement. The combination of the 35-jewel movement, the fully spelled-out day window at six o'clock, and the luxurious gold-on-steel aesthetic makes this a highly desirable configuration for any vintage enthusiast. History Introduced in the early 1960s, the Seikomatic line was aimed at the premium segment of the watch market, offering robust automatic movements with high jewel counts and advanced shock protection. The Weekdater models, featuring the innovative layout of the day at six o'clock, were a precursor to the first automatic Grand Seiko models. They represent a significant milestone in Seiko's journey toward creating high-precision, luxury timepieces that could rival international competitors, securing a lasting legacy among vintage watch collectors today. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and very securely packaged, and shipped with tracking and insurance for your peace of mind. We ship via fast express service, with typical delivery in 1–4 business days (destination dependent). Please review all photos carefully before bidding. We strive to photograph each watch from multiple angles for the most accurate representation. The photos form an important part of the description. As with all vintage watches, water resistance is not guaranteed. The watch will be delivered in fully functional, working condition. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: SEI-SWD-0002