{"product_id":"vintage-1966-japan-seiko-seikomatic-r-weekdater-8306-8001-30jewels-automatic-1","title":"Vintage 1966 JAPAN SEIKO SEIKOMATIC-R WEEKDATER 8306-8001 30Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1966 JAPAN SEIKO SEIKOMATIC-R WEEKDATER 8306-8001 30Jewels 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-R WEEKDATER 8306-8001 30Jewels \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 : 83 SEIKOMATIC-R WEEKDATER.\u003c\/li\u003e\n\u003cli\u003eCaliber number : 8306A.\u003c\/li\u003e\n\u003cli\u003eMovement : Automatic.\u003c\/li\u003e\n\u003cli\u003eBeat rate : 18000bph.\u003c\/li\u003e\n\u003cli\u003eYear of manufacture start : 1965'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 : 6802047.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 8306-8010T AD.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\u003c\/li\u003e\n\u003cli\u003eCase size : About 35.5mm.\u003c\/li\u003e\n\u003cli\u003eLug width : 18mm.\u003c\/li\u003e\n\u003cli\u003eBand : Wrist size that can be worn is Up to about 205mm.\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 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 Peak of Mid-60s Business Automatic Luxury (1966):\u003c\/b\u003e Manufactured in \u003cb\u003e1966\u003c\/b\u003e—a landmark historical year defined by Japan's post-war economic boom and technological leadership in watchmaking—the \u003cb\u003eSeiko Seikomatic-R Weekdater\u003c\/b\u003e reference \u003cb\u003e8306-8001\u003c\/b\u003e represented Suwa Seikosha's elevated business-class automatic series. Positioned above standard Seikomatic models, the \"\"R\"\" (Refined) designation signified superior movement finishing, ultra-thin case profiling, and executive sophistication during the golden Showa era.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Over-Engineered 30-Jewel Caliber 8306 Automatic Heart:\u003c\/b\u003e Powering this historic timepiece is the celebrated \u003cb\u003e30-jewel Caliber 8306A\u003c\/b\u003e, an in-house automatic engine operating at \u003cb\u003e18,000 vibrations per hour (vph)\u003c\/b\u003e. Equipping an automatic watch in \u003cb\u003e1966\u003c\/b\u003e with an expansive \u003cb\u003e30-jewel specification\u003c\/b\u003e was a bold statement of micro-engineering luxury, utilizing synthetic rubies across gear-train pivots to minimize mechanical friction. It features manual-winding capability, a quick-set date function, and Seiko's \u003cb\u003eDiashock\u003c\/b\u003e anti-shock protection system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8001\"\" Case Geometry and Recessed Crown:\u003c\/b\u003e Sourced in a solid stainless steel case, the reference \u003cb\u003e8306-8001\u003c\/b\u003e is globally recognized among vintage collectors for its sleek executive proportions. Executed with sharp, faceted lugs and mirror-polished bevels inspired by Taro Tanaka's early \u003cb\u003e\"\"Grammar of Design\"\"\u003c\/b\u003e guidelines, it features Suwa's signature \u003cb\u003erecessed crown hidden at 4 o'clock\u003c\/b\u003e, allowing the thin case silhouette to rest completely flush against the wrist.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMasterful \"\"Weekdater\"\" Dial Harmony and Fine Typography:\u003c\/b\u003e The dial of the \u003cb\u003e8306-8001\u003c\/b\u003e showcases exemplary mid-century visual balance, featuring a radiant silver sunburst canvas set with \u003cb\u003ehand-applied, multifaceted rectangular block indices\u003c\/b\u003e and sharp dauphine hands. Symmetrically framed, it displays a distinct day calendar aperture paired with a framed date window at 3 o'clock, proudly adorned with applied \u003cb\u003e\"\"SEIKOMATIC-R\"\"\u003c\/b\u003e script and the \u003cb\u003e\"\"30 JEWELS\"\"\u003c\/b\u003e designation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Sovereign Dolphin Case Back Medallion Heritage:\u003c\/b\u003e The ultimate hallmark of this 1966 vintage treasure sits stamped on the case back: the iconic \u003cb\u003eSeiko Dolphin crest\u003c\/b\u003e (or deeply etched waterproof dolphin medallion). Certifying its factory-regulated precision and water-resistant construction, the 8306-8001 Seikomatic-R stands as an essential, investment-grade cornerstone reference for serious vintage Seiko collectors 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\/q1241754613.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":67611227128129,"sku":"q1241754613","price":80400.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_3be7dd78-5126-4b4c-b311-14c2f08da70d.jpg?v=1790906524","url":"https:\/\/nonkun.com\/products\/vintage-1966-japan-seiko-seikomatic-r-weekdater-8306-8001-30jewels-automatic-1","provider":"NONKUN Japan","version":"1.0","type":"link"}