Seiko Seikomatic Weekdater 金月 6218-8950 (1965)

Available now on auction by Second Vintage This is a remarkable example of mid-1960s Japanese horological excellence, featuring the highly regarded 35-jewel movement that bridged the gap between standard automatics and the Grand Seiko line. The Seikomatic Weekdater is a collector favorite for its robust build and elegant design, and this specific reference 6218-8950 from July 1965 showcases a stunning sunburst dial that has survived the decades in impressive fashion. With its hidden crown and distinct case geometry, it offers a sophisticated vintage presence on the wrist. Brand: Seiko Model: Seikomatic Weekdater Reference Number: 6218-8950 Serial Number: 5701526 Movement: Automatic Caliber 6218A Dial: Silver Sunburst Case Size: 36 mm (excluding the crown) Case Material: Gold Plated (SGP) Production Year: 1965 Condition: Good vintage condition Dial and Hands The silver sunburst dial is the absolute highlight of this timepiece, presenting in excellent condition with a bright, radial finish that catches the light beautifully. The applied gold-tone faceted indices are sharp and highly polished, offering excellent legibility and a luxurious aesthetic. The day and date window is framed in gold at the 3 o'clock position, featuring the classic English day display. The dauphine-style hands are well-preserved, complementing the markers perfectly, while the printed "Seikomatic Diashock 35 Jewels" text remains crisp and distinct. Case and Crystal The 36mm case is finished in Seiko Gold Plate (SGP) and features the characteristic recessed crown at the 4 o'clock position, a design choice intended to emphasize the automatic nature of the watch. As is common with honest vintage pieces of this era, the case shows signs of wear, particularly on the lugs and high edges where the gold plating has thinned or worn through to the base metal, revealing the history of its use. The caseback features the iconic dolphin emblem, deeply embossed and clearly visible, along with the reference and serial markings. The crystal appears clear with no distracting marks, allowing an unobstructed view of the dial. Movement Powering this watch is the high-grade Seiko Caliber 6218A automatic movement, boasting an impressive 35 jewels. This movement was considered one of Seiko's finest of the period, featuring a smooth sweep and reliable engineering. The movement surfaces appear clean and well-maintained. On the timegrapher, the watch is currently running between +40 and +50 seconds per day, which indicates a healthy, active movement running within acceptable vintage tolerances for an unregulated mechanical timekeeper of this age. Strap The watch is fitted with a black leather strap featuring an alligator-style grain and contrast yellow stitching that complements the gold tones of the case and indices. It is finished with a gold-tone buckle, making it ready to wear immediately. Condition This timepiece is in good vintage condition. The dial is exceptionally well-preserved and rates very high, while the case shows moderate wear consistent with its age and material, specifically regarding the gold plating on the lugs and bezel edges. The movement is clean and functional, offering reliable vintage performance. Dimensions With a case diameter of 36mm, this watch sits comfortably on the wrist, offering a classic mid-century profile that slips easily under a shirt cuff while still commanding presence due to the bright dial and gold tones. Remarks The Seikomatic Weekdater 6218 series represents a significant point in Seiko's history, utilizing a movement architecture shared with the earliest Grand Seiko automatic models. The 35-jewel count was a statement of quality and precision engineering in 1965. Finding a dial this clean on a 6218 reference is becoming increasingly difficult, making this a fantastic opportunity for collectors who value dial condition above all else. History Introduced in the early 1960s, the Seikomatic line was Seiko's push to popularize the automatic movement in Japan and abroad. The Weekdater models added practical calendar complications that were highly desirable for the business professional of the era. The 6218 caliber specifically is revered by enthusiasts as one of the best mass-production movements Seiko ever built, serving as the foundation for the legendary 62GS Grand Seiko. This specific watch, produced in 1965, comes from the golden era of Seiko's mechanical innovation. /Second Vintage SKU: SEI-SMW-0004