{"product_id":"vintage-1965-japan-seiko-seikomatic-weekdater-6206-8990-26jewels-automatic-1","title":"Vintage 1965 JAPAN SEIKO SEIKOMATIC WEEKDATER 6206-8990 26Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1965 JAPAN SEIKO SEIKOMATIC WEEKDATER 6206-8990 26Jewels Automatic.\u003c\/h3\u003e\u003cp\u003eWelcome to my auction!\u003cbr\u003eI am Japanese who live in Tokyo.\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 number : 5604844.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 6206-8990T AD.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\u003c\/li\u003e\n\u003cli\u003eCase size : About 37mm.\u003c\/li\u003e\n\u003cli\u003eLug width : 19mm.\u003c\/li\u003e\n\u003cli\u003eBand : Wrist size that can be worn is Up to about 200mm.\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\n\u003cli\u003e\n\u003cb\u003eThe Sovereign Peak of 1965 Executive Weekdater Heritage (1965):\u003c\/b\u003e Manufactured in **1965**—a historic year during Japan's mid-century economic boom and horological golden era—the **Seiko Seikomatic Weekdater** reference **6206-8990** stands as a classic executive dress automatic from Suwa Seikosha. Evolving directly from the early J13080 platform, this reference solidified Seiko's signature full-day arched calendar layout for high-ranking corporate professionals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe High-Grade 26-Jewel Caliber 6206 Automatic Engine:\u003c\/b\u003e Powering this historic timepiece is the robust **26-jewel Caliber 6206B**, an in-house automatic engine operating at a steady frequency of **18,000 vibrations per hour (vph)**. Equipping a mid-1960s dress watch with an elevated **26-jewel count** provided exceptional gear-train pivot protection, featuring a quick-set date mechanism and Seiko's highly efficient Magic Lever self-winding architecture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8990\"\" Broad-Lugging Case and Recessed Crown:\u003c\/b\u003e Sourced in a heavy-gauge stainless steel case, the reference **6206-8990** features bold, sweeping lugs with thick Zaratsu-polished chamfers and clean geometric lines. Designed with a slim bezel profile and the signature **recessed crown hidden at 4 o'clock**, the case maintains a completely seamless, crownless silhouette that sits flush and commanding on the wrist.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHistoric Arched \"\"Weekdater\"\" Dial Layout and Mid-Century Elegance:\u003c\/b\u003e The dial of the **6206-8990** displays a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular block indices** and razor-edged dauphine hands. It proudly showcases the iconic **curved full-day aperture positioned above 6 o'clock**—spelling out days like \"\"MONDAY\"\" in bold typography—perfectly balanced by the framed date window at 3 o'clock and the script **\"\"Seikomatic\"\"** text.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Sovereign Solid Gold Dolphin Case Back Medallion:\u003c\/b\u003e The ultimate hallmark of prestige rests on the case back: the iconic **solid gold-embossed Seiko Dolphin medallion** set into the center. Certifying its elite factory-regulated chronometric precision and water-resistant construction, the 1965 6206-8990 26-jewel Seikomatic Weekdater stands as an indispensable, investment-grade cornerstone reference for collectors worldwide.\u003c\/li\u003e\n\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\/r1231856987.jpg\"\u003e\u003c\/div\u003e\u003c\/dd\u003e\n\u003cdt style=\"font-size: 24px;font-weight: bolder;\"\u003eNotes\u003c\/dt\u003e\n\u003cdd\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":52186280984897,"sku":"r1231856987","price":68600.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_60e83e59-b20a-428f-8bda-1162af3d4ca2.jpg?v=1788927204","url":"https:\/\/nonkun.com\/products\/vintage-1965-japan-seiko-seikomatic-weekdater-6206-8990-26jewels-automatic-1","provider":"NONKUN Japan","version":"1.0","type":"link"}