Seiko Seikomatic Weekdater 6218-8950 (1965)

Offered in this auction by Second Vintage This exceptional timepiece represents the golden era of Seiko manufacturing in the 1960s, combining a high-count jewel movement with the practical elegance of the famous Weekdater design. The Seikomatic line was instrumental in establishing Seiko as a premier manufacture of automatic watches, and this specific reference, with its robust 37mm case and complex dial layout, offers a substantial presence on the wrist. It stands as a testament to the "Grammar of Design" era, offering collectors a piece of history that balances daily utility with sophisticated mid-century aesthetics. Brand: Seiko Model: Seikomatic Weekdater Reference Number: 6218-8950 Serial Number: 5700021 Movement: Automatic Caliber 6218A Dial: Silver sunburst with applied gold indices Case Size: 37 mm (excluding the crown) Case Material: Gold Plated Production Year: 1965 Condition: Good vintage condition. The watch presents an honest and attractive aesthetic with visible signs of history on the case, while the dial remains remarkably well-preserved. Dial and Hands The silver sunburst dial is the highlight of this timepiece, preserved in excellent condition with a radiating finish that catches the light beautifully. It features substantial applied gold faceted hour markers that add depth and luxury to the face. The sharp gold dauphine hands are legible and retain their vintage character with minor signs of age. The distinctive day and date apertures are framed in gold at the three o'clock position, showcasing the "Weekdater" complication that gives this model its name. The text remains crisp and black, contrasting elegantly against the silver background. Case and Crystal The 37mm gold-plated case features the signature recessed crown at the 4 o'clock position, a design choice intended to streamline the silhouette and emphasize the automatic nature of the movement. The case shows honest vintage wear, with visible plating loss on the lug edges and high points, revealing the base metal underneath in a way that speaks to its history and use. The caseback retains the iconic Seikomatic dolphin and crown emblem, though it shows surface scratches consistent with age. The acrylic crystal is clear and presentable, allowing for an unobstructed view of the dial. Movement Powering this watch is the highly regarded Seiko Caliber 6218A, a 35-jewel automatic movement that was considered a high-grade engine during its production era, often compared to Grand Seiko standards of the time. The movement is clean and visually impressive. It is running within vintage tolerances. Timegrapher testing shows a daily rate between -21s and -33s/day, which indicates the movement is functioning but may show variance typical of an unserviced vintage mechanism. Strap The watch is fitted with a black leather strap featuring yellow contrast stitching. This pairing complements the gold tones of the case and indices, giving the watch a sporty yet refined look suitable for casual or dress wear. Condition This timepiece is rated in good vintage condition. While the case exhibits evident signs of wear and gold plating loss typical of a watch from the mid-1960s, the structural integrity is sound. The dial is in superior condition relative to the case, making it a "dial-first" example that looks stunning on the wrist despite the case patina. Dimensions With a case diameter of 37mm, this Seikomatic wears slightly larger than many distinct dress watches of its era due to the thickness of the lugs and the wide dial opening. It offers a modern-feeling stance on the wrist while retaining classic proportions. Remarks The Seikomatic Weekdater 6218-8950 is a significant reference for Seiko collectors. The 35-jewel count was a brag-worthy specification in 1965, signaling a movement built for longevity and reduced friction. The dedicated day and date windows were a premium feature, and the overall execution of the dial markers anticipates the design language that would define Seiko's luxury pieces for decades. History Introduced in the early 1960s, the Seikomatic range was Seiko's push to make automatic watches the standard for the everyday professional. This specific example dates to July 1965, a period when Seiko was rapidly refining its manufacturing capabilities to compete with Swiss chronometers. The 6218 caliber found inside this watch is a direct ancestor to movements used in the 62GS, the first automatic Grand Seiko, making this Weekdater a sleeper hit among horological historians who appreciate high-grade engineering in an accessible package. / Second Vintage SKU: SEI-SSD-0012