{"product_id":"vintage-1966-japan-seiko-seikomatic-r-weekdater-8306-8001-30jewels-automatic","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 : 6710326.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 8306-8020T AD.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\u003c\/li\u003e\n\u003cli\u003eCase size : About 35.4mm.\u003c\/li\u003e\n\u003cli\u003eLug width : 18mm.\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 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 Pinnacle of Mid-60s Slim Executive Luxury (1966):\u003c\/b\u003e Manufactured in **1966**—a defining historical year during Japan's peak post-war industrial modernization—the **Seiko Seikomatic-R Weekdater** represented the gold standard of high-society dress watchmaking. Born from the prestigious **Suwa Seikosha** factory under reference **8306-8001**, this flagship timepiece belonged to the elite \"\"R\"\" (Refined\/Regis) lineage. Explicitly engineered for corporate executives, it achieved an exceptionally low-profile, comfortable wrist presence that prioritized high-fashion sophistication over bulk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Over-Engineered 30-Jewel Caliber 8306 Automatic Heart:\u003c\/b\u003e This watch is powered by the magnificent **30-jewel Caliber 8306A**, a premium ultra-slim automatic movement operating at a classic frequency of **18,000 vibrations per hour (vph)**. In **1966**, equipping a slim dress watch with a lavish **30-jewel specification** was a monumental statement of micro-engineering prowess. Utilizing a vast array of synthetic rubies across vital gear-train pivots to minimize rotor friction, this caliber allowed Suwa to construct a remarkably flat case without compromising mechanical stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8001\"\" Low-Profile Case and Sleek Geometry:\u003c\/b\u003e The reference **8306-8001** is globally celebrated among vintage purists for its textbook implementation of classic modernist proportions. The solid case features an extraordinarily thin bezel paired with **slender, beautifully angled lugs** finished with zero-distortion mirror polishing. Adhering to Suwa's automatic design rules, it houses a low-profile crown that lets the watch sit entirely flush against the skin, sliding completely weightless under a tailored shirt cuff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eImmaculate Weekdater Dial Harmony and Dual Calendar Layout:\u003c\/b\u003e The dial of the **8306-8001** is a study in mid-century visual balance, showcasing a radiant silver sunburst canvas. It features a highly distinguished **separated dual-calendar layout**: a framed date window at 3 o'clock and a distinct, horizontally arched **day-of-the-week aperture located symmetrically above 6 o'clock**. Decorated with hand-applied, multifaceted elongated block indices, this balanced layout prioritized split-second legibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAn Investment-Grade Treasure of Suwa's Slim Heritage:\u003c\/b\u003e Manufactured in the milestone mechanical year of **1966**, the 8306-8001 30-jewel variant remains a highly coveted cornerstone reference for serious vintage Seiko collectors worldwide. It represents the perfect historical intersection where mid-1960s sharp case finishing and traditional automatic efficiency met right before the industry shifted toward higher frequencies. Built to an uncompromising heirloom standard, it stands as a profound testament to an era when Suwa perfected the luxury slim daily instrument.\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\/n1235543960.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":52078113784129,"sku":"n1235543960","price":60200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_ad0e65f7-2056-439f-8674-e6e667962c38.jpg?v=1786515398","url":"https:\/\/nonkun.com\/products\/vintage-1966-japan-seiko-seikomatic-r-weekdater-8306-8001-30jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}