{"product_id":"vintage-1964-japan-seiko-seikomatic-weekdater-6206-8990-26jewels-automatic","title":"Vintage 1964 JAPAN SEIKO SEIKOMATIC WEEKDATER 6206-8990 26Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1964 JAPAN SEIKO SEIKOMATIC WEEKDATER 6206-8990 26Jewels Automatic.\u003c\/h3\u003e\u003cp\u003eWelcome to my auction!\u003c\/p\u003e\n\u003ch4 style=\"font-size: 24px; color : #2B0000; margin-bottom: 18px;\"\u003eItem description\u003c\/h4\u003e\u003cdiv style=\"font-size: 24px; color:red; margin: 0 50px 18px 35px;\"\u003e\nIt's a SEIKO Automatic Watch, \u003cb\u003eSEIKOMATIC WEEKDATER 6206-8990 26Jewels \u003c\/b\u003e.\u003cbr\u003e\n\u003cb\u003eIt's in good used condition.\u003c\/b\u003e\u003cbr\u003e\nIt's difficult to find this valuable watch in such a good condition.\nHighly recommended for SEIKO collectors!\n\u003c\/div\u003e\n\u003cdl style=\"margin:0 0 34px 90px\"\u003e\n\u003cdt\u003e\u003cfont color=\"#970000\"\u003e\u003cb\u003eMovement : \u003c\/b\u003e\u003c\/font\u003e\u003c\/dt\u003e\n\u003cdd\u003e\u003cul\u003e\n\u003cli\u003ePet name : SEIKOMATIC WEEKDATER .\u003c\/li\u003e\n\u003cli\u003eCaliber number : 6206A,B.\u003c\/li\u003e\n\u003cli\u003eMovement : Automatic.\u003c\/li\u003e\n\u003cli\u003eBeat rate : 18000bph.\u003c\/li\u003e\n\u003cli\u003eYear of manufacture start : 1963's.\u003c\/li\u003e\n\u003cli\u003eFactory : Suwa.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/dd\u003e\n\u003cdt\u003e\u003cfont color=\"#970000\"\u003e\u003cb\u003eExternals : \u003c\/b\u003e\u003c\/font\u003e\u003c\/dt\u003e\n\u003cdd\u003e\u003cul\u003e\n\u003cli\u003eSerial No. : 4801696.\u003c\/li\u003e\n\u003cli\u003eDial No. : MADE IN JAPAN 6206-8990R.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\u003c\/li\u003e\n\u003cli\u003eCase size : About 37.11mm.\u003c\/li\u003e\n\u003cli\u003eLug width : 19mm.\u003c\/li\u003e\n\u003cli\u003eBand : New Leather Strap.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/dd\u003e\n\u003cdt\u003e\u003cfont color=\"#970000\"\u003e\u003cb\u003eCondition : \u003c\/b\u003e\u003c\/font\u003e\u003c\/dt\u003e\n\u003cdd\u003e\u003cul\u003e\n\u003cli\u003eUsed, it runs well.\u003c\/li\u003e\n\u003cli\u003eQuick set(Day\/Date) : Okay.\u003cbr\u003eSet the day of the week : English only.\u003cbr\u003eSet of the date : The set at one stage pulling the crown.\u003cbr\u003eSet of the days of the week : Iteration the hour hand at 10:00 and 1:00\u003c\/li\u003e\n\u003cli\u003eThe day difference time of an used watch is about +-1 minute \/ day.\u003c\/li\u003e\n\u003cli\u003eFor practical, everyday use, it would be advisable to have the movement cleaned and oiled.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/dd\u003e\n\u003cdt\u003e\u003cfont color=\"#970000\"\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/font\u003e\u003c\/dt\u003e\n\u003cdd\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eThe Sovereign Dawn of Executive Weekdater Design (1964):\u003c\/b\u003e Manufactured in \u003cb\u003e1964\u003c\/b\u003e—a monumental historical year marked by the Tokyo Olympic Games and Seiko's global horological emergence—the \u003cb\u003eSeiko Seikomatic Weekdater\u003c\/b\u003e reference \u003cb\u003e6206-8990\u003c\/b\u003e stands as a foundational executive automatic timepiece from Suwa Seikosha. Positioned at the core of Seiko's high-grade business watch lineup, this mid-1960s cornerstone established the classic dual-calendar layout that defined Showa-era corporate elegance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe High-Grade 26-Jewel Caliber 6206 Automatic Heart:\u003c\/b\u003e Powering this historic watch is the respected \u003cb\u003e26-jewel Caliber 6206A\u003c\/b\u003e, an in-house automatic movement operating at \u003cb\u003e18,000 vibrations per hour (vph)\u003c\/b\u003e. Utilizing a lavish \u003cb\u003e26-jewel specification\u003c\/b\u003e to reduce gear-train friction across critical wheel pivots, it features Seiko's \u003cb\u003eDiashock\u003c\/b\u003e anti-shock protection, efficient magic-lever automatic winding, and a dedicated quick-set date calendar mechanism.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8990\"\" Classic Case and Recessed Crown Profile:\u003c\/b\u003e Executed in a solid stainless steel case, the reference \u003cb\u003e6206-8990\u003c\/b\u003e features long, sweeping lugs with crisp polished facets and substantial wrist presence. Incorporating Suwa's signature \u003cb\u003erecessed crown at 4 o'clock\u003c\/b\u003e, the case maintains a smooth, completely symmetrical silhouette that sits flush against the wrist and glides seamlessly beneath a formal suit cuff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIconic Arch Day Window and Sunburst Dial Layout:\u003c\/b\u003e The dial of the \u003cb\u003e6206-8990\u003c\/b\u003e is a masterclass in mid-century layout visual balance, featuring a radiant silver sunburst backdrop set with \u003cb\u003ehand-applied, multifaceted rectangular block indices\u003c\/b\u003e. It is famously recognized by its distinct arched \u003cb\u003efull day-of-the-week window positioned at 6 o'clock\u003c\/b\u003e (or 12 o'clock depending on dial variation), complemented by a framed date aperture at 3 o'clock and bold \u003cb\u003e\"\"SEIKOMATIC\"\"\u003c\/b\u003e typography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Sovereign Dolphin Case Back Medallion Heritage:\u003c\/b\u003e Embellishing the backplate of this 1964 treasure is the iconic \u003cb\u003eembossed Seiko Dolphin crest\u003c\/b\u003e (or silver waterproof medallion). Certifying its factory-tested water resistance and high-grade automatic construction, the 6206-8990 26-jewel Seikomatic Weekdater remains an indispensable, highly collectible cornerstone reference for vintage Seiko purists worldwide.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cdl style=\"margin:0 0 34px 40px\"\u003e\n\u003cdt style=\"font-size: 24px;font-weight: bolder;\"\u003eFor more information, please look at the pictures.\u003c\/dt\u003e\n\u003cdd\u003e\u003cdiv style=\"margin: 14px 0 40px 0;\"\u003e\u003cimg src=\"https:\/\/nonkun.boy.jp\/img_ebay\/c1242523610.jpg\"\u003e\u003c\/div\u003e\u003c\/dd\u003e\n\u003cdt style=\"font-size: 24px;font-weight: bolder;\"\u003eNotes\u003c\/dt\u003e\n\u003cdd style=\"margin-left: 16px;\"\u003e\n\u003cul style=\"margin-bottom: 18px;\"\u003e\n\u003cli\u003e\n\u003cb\u003eBefore buying.\u003c\/b\u003e\u003cdiv style=\"padding-left : 30px;\"\u003eThe vintage watches we sell are inspected and adjusted so they work fine. However, since it is an vintage watch, Please purchase on the assumption that it will be repaired.\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTo prevent shipping accidents.\u003c\/b\u003e\u003cdiv style=\"padding-left : 30px;\"\u003ePlease monitor the tracking number until the item arrives and if it stagnates, please investigate at your country post office. Also, please confirm the item when you receive the item.\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAbout import taxes.\u003c\/b\u003e\u003cdiv style=\"padding-left : 30px;\"\u003eTaxes such as import duties and VAT are not included in the item price or shipping charges, except for items shipped to the US. When you purchase, you will likely be required to pay these fees in your country.\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAbout Payment, Shipping, Return.\u003c\/b\u003e\u003cdiv style=\"padding-left : 30px;\"\u003ePayment, Shipping, Return are in accordance with eBay's business policies.\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cbr\u003e","brand":"Seiko","offers":[{"title":"Default Title","offer_id":68079010414913,"sku":"c1242523610","price":94000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_2dabe285-24bb-4548-b25f-43f3a45bc31a.jpg?v=1793158516","url":"https:\/\/nonkun.com\/products\/vintage-1964-japan-seiko-seikomatic-weekdater-6206-8990-26jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}