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    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 1
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 2
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 3
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 4
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 5
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 6
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 7
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 8
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 9
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 10
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 11
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 12
    Seiko Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964 vintage watch - image 13
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    Seiko - Seikomatic Weekdater - No reserve price - 6206-8990 - Men - 1964

    Seiko • 1964

    Sold for
    €260
    Sold on Jun 28, 2026
    31 bids61 watching

    About This Watch

    Presented for auction by Second Vintage The Seikomatic Weekdater stands as a brilliant testament to Seiko's mid-century mastery of both mechanical innovation and elegant design. Introduced during an era of rapid horological advancement for the brand, this model was designed specifically for the modern professional, offering the highly practical addition of a full-day display. With its distinctive layout, robust automatic movement, and the charming dolphin emblem gracing the caseback to denote its water-resistant capabilities, this timepiece captures the sophisticated yet highly functional ethos of 1960s Japanese watchmaking. Brand: Seiko Model: Seikomatic Weekdater Reference Number: 6206-8990 Serial Number: 4803537 Movement: Automatic Caliber 6206A, 26 Jewels Dial: Silver sunburst dial with applied faceted indices, exceptionally clean and well-preserved Case Size: 37 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1964 Condition: Excellent vintage condition with a remarkably crisp dial and well-defined case lines Dial and Hands The dial of this Seikomatic is a visual delight, featuring a brilliant silver sunburst finish that radiates beautifully under the light. It is adorned with applied, faceted baton indices featuring dark central inserts that provide excellent contrast and legibility. The dial layout is highly distinctive, boasting a framed date aperture at the three o'clock position and a beautifully integrated, full-word day window at six o'clock, proudly displaying Sunday in striking red typography. The elegant cursive Seikomatic script and crisp black printed text remain perfectly intact. The classic Dauphine hands mirror the indices with matching dark central accents. Condition-wise, the dial is exceptionally well-preserved, showing a clean, even texture with no significant spots or damage, while the hands exhibit only minor, honest oxidation visible under magnification, entirely consistent with a carefully kept vintage timepiece. Case and Crystal The 37 millimeter stainless steel case embodies the refined architectural lines of 1960s Seiko design. The case features a smooth, polished bezel and robust lugs that retain their sharp factory chamfers and distinct profile, showing only normal, honest signs of wear without heavy polishing. The crown is thoughtfully recessed at the four o'clock position, maintaining the watch's sleek, uninterrupted silhouette. Turning the watch over reveals a highly legible caseback featuring the iconic Seiko Dolphin engraving, alongside clearly defined reference and serial numbers. The watch is fitted with a domed acrylic crystal that protects the dial perfectly, displaying only light surface wear indicative of careful previous use. Movement Powering this Weekdater is the gold-toned Seiko automatic caliber 6206A, featuring 26 jewels. The movement is visually striking, with its golden plates and rotor bearing clear, crisp Seiko engravings. While the outer movement ring shows expected age-related tarnish, the caliber itself remains bright and well-kept. Running in vintage operational condition. Maintains the authentic mechanical character of the era. The timegrapher result reads 55 seconds per day. Strap The watch is paired with a period-appropriate black textured leather strap. The strap features a distinct woven or reptile-style embossed pattern with contrasting white stitching, complementing the vintage aesthetic of the dial and case perfectly. Condition This timepiece is presented in excellent vintage condition. The dial is stunningly preserved, serving as the centerpiece of the watch with its crisp sunburst finish and clean layout. The stainless steel case remains sharp and well-defined, and the deeply engraved dolphin caseback is wonderfully intact. Dimensions Case Size: 37 mm (excluding the crown) Remarks A superb example of mid-1960s Seiko design, blending everyday practicality with refined elegance. The full-day display remains a beloved feature among collectors, and finding an example with such a beautifully preserved dial and crisp caseback makes this a truly compelling addition to any vintage portfolio. History Introduced in the early 1960s, the Seikomatic line represented Seiko's premier range of automatic watches before the widespread dominance of the Grand Seiko and King Seiko automatic models. The Weekdater, with its innovative day and date layout, was crafted for the rising class of business professionals, offering a sophisticated look combined with robust daily reliability. The dolphin caseback became a symbol of Seiko's advancing water-resistance technology, marking an era where elegant dress watches were increasingly built to withstand the rigors of everyday life. / Second Vintage SKU: SEI-MWJ-0002

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