Seiko Seikomatic Weekdater 6218-8971 (1965)

Now available at auction from Second Vintage This vintage Seikomatic Weekdater presents a classic layout with the day displayed prominently at 6 o'clock, complemented by the dolphin and crown emblem on the caseback. Powered by the 35-jewel automatic caliber 6218B, it offers a strong representation of Seiko's mid-century mechanical design. Brand: Seiko Model: Seikomatic Weekdater Reference Number: 6218-8971 Serial Number: 5001976 Movement: Automatic, caliber 6218B, 35 jewels Dial: Silver sunburst finish with 6 o'clock day and 3 o'clock date Case Size: 37mm (excluding the crown) Case Material: Stainless steel Production Year: 1965 Condition: Good vintage condition. Timegrapher: +8+12s/day, performing remarkably well. Dial and Hands The dial features a silver sunburst finish, applied indices, and intact logos. It showcases the distinctive Weekdater layout, placing the date window at 3 o'clock and the day window above the 6 o'clock marker. There is noticeable moisture staining and discoloration along the left edge from 8 to 11 o'clock. The dauphine style hands display light aging, with minor surface oxidation and spotting visible under magnification. Case and Crystal The stainless steel case shows honest wear consistent with age, displaying moderate scratches and scuffs throughout, though the edges remain reasonably defined. The caseback features the dolphin and crown emblem. A smooth polished bezel frames the dial, showing scratches and light wear. The crown is recessed at the 4 o'clock position. A domed acrylic crystal protects the dial, presenting light surface scratches and scuffs. Movement Inside beats the automatic caliber 6218B, a 35-jewel movement that features a teardrop fine-adjustment mechanism on the balance cock. The movement displays a clean overall appearance with no severe corrosion or damage visible, bearing engravings for the caliber, brand, jewel count, and origin. Exhibiting remarkable accuracy and consistency, performing brilliantly for a vintage timepiece. The timegrapher records a rate of +8+12s/day. Strap The watch is fitted with a period correct stainless steel block-link bracelet, offering a fitting aesthetic for the era. The bracelet shows moderate surface scratches and will accommodate a maximum wrist size of 19cm. Condition Good vintage condition. The stainless steel case presents honest wear with moderate scratches and scuffs, while retaining reasonably defined edges. The silver dial shows noticeable moisture staining and discoloration along the left edge. The hands exhibit minor oxidation. The crystal, bezel, and period correct bracelet display light to moderate surface scratches. Supported by the recorded timegrapher result, the movement is performing very strongly. Dimensions The case measures 37mm across, excluding the crown. Remarks This Seikomatic Weekdater offers the appealing 6 o'clock day display and a highly capable 35-jewel movement. The honest wear makes it a solid addition for collectors of mid-century Japanese horology. History The Seikomatic Weekdater reference 6218-8971 was produced from late 1964 until April 1966. It was a well-known and standard production model from Seiko's 1960s lineup, recognized for its distinctive calendar layout. Unlike its predecessor, the 8971 utilizes a notched ring that aligns with a dial tab at 2 o'clock to ensure the chapter ring is easily and correctly positioned. The caliber 6218B further distinguished the model with its refined technical details, reflecting Seiko's commitment to mechanical advancement during the 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-0009