Seiko Seikomatic Weekdater 6218-8970 (1964)

Offered in this auction by Second Vintage This highly regarded 35-jewel Seikomatic Weekdater is a collector favourite, defined by its distinctive dual-calendar layout. Featuring an exceptionally clean silver sunburst dial with the day display prominently positioned at six o'clock, it maintains a beautifully symmetrical profile enhanced by its recessed four o'clock crown. Brand: Seiko Model: Seikomatic Weekdater Reference Number: 6218-8970 Serial Number: 482158 Movement: Automatic, caliber 6218A, 35 jewels Dial: Silver sunburst with applied faceted indices, day at 6 o'clock, date at 3 o'clock Case Size: 37mm (excluding the crown) Case Material: Stainless steel Production Year: 1964 Condition: Excellent vintage condition. Timegrapher: +29+35s/day, running strong and steady. Dial and Hands The silver sunburst dial is well-preserved and highly legible, featuring a clean surface with minimal signs of aging. It is fitted with applied faceted indices, a framed date window at three o'clock, and the signature framed day window at six o'clock displaying in English. The dauphine-style hour and minute hands are sharp, matching the dial furniture perfectly. They retain a clean polished finish, showing only very minor dust or micro-oxidation visible under magnification. Case and Crystal The 37mm stainless steel case displays honest vintage wear, presenting polished flanks and brushed lug tops. The edges remain reasonably defined but show signs of wear, alongside moderate scratches and minor dings consistent with age and use. A smooth polished fixed bezel surrounds the dial, showing surface scratches consistent with the case. The watch features a recessed crown positioned at four o'clock, which is unsigned, correct for this model. The domed acrylic crystal is clear with no major scratches or cracks visible, presenting only minor micro-scratches typical of the material. Movement Inside beats the automatic caliber 6218A, featuring 35 jewels. The movement presents a clean overall appearance, with the rotor and bridges showing minimal wear or oxidation, and bears crisp engravings of SEIKO, 35 JEWELS, and 6218A. The timegrapher result is +29+35s/day. Performing well within expected vintage tolerances; running strong and steady. Strap The watch is fitted with a period correct stainless steel folded-link style bracelet. It presents as a handsome, period-appropriate steel bracelet that shows moderate wear and surface scratches. It accommodates a maximum wrist size of 18cm. Condition Excellent vintage condition. The dial and hands remain exceptionally well-preserved and highly legible. The stainless steel case and period correct bracelet display honest vintage wear, with moderate scratches and minor dings consistent with age. The acrylic crystal is clear. Supported by the recorded timegrapher result, the watch is running strong and steady. Dimensions 37mm (excluding the crown) Remarks This Seikomatic Weekdater offers a superb combination of mid-century Japanese design and high-grade mechanics. The exceptionally clean silver sunburst dial and the robust 35-jewel automatic movement make this a highly compelling addition for enthusiasts of classic Seiko watchmaking. History The Seikomatic Weekdater represents a significant era of high-end Seiko automatic watchmaking from the mid-1960s. The model is celebrated for its distinctive dual-calendar layout, which places a prominent full-day display at the six o'clock position. Powering this generation is the caliber 6218, a sophisticated 35-jewel automatic movement operating at 18,000 beats per hour and featuring a hacking function. This higher-end caliber shares a direct relationship with the Grand Seiko line of the period and utilizes Seiko's Diafix shock springs on jewels other than the balance jewels, ensuring robust performance alongside its refined architecture. 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-0013