{"product_id":"vintage-1967-japan-seiko-seikomatic-r-8305-8031-30jewels-automatic","title":"Vintage 1967 JAPAN SEIKO SEIKOMATIC-R 8305-8031 30Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1967 JAPAN SEIKO SEIKOMATIC-R 8305-8031 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 8305-8031 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.\u003c\/li\u003e\n\u003cli\u003eCaliber number : 8305C.\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 : 7D2087.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN8305-8030TAD.\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 : 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\u003eONE PIECE CASE.\u003cbr\u003eQuick set(Day\/Date) : Okay. \u003cbr\u003eSet of the date : The set at one stage pulling the crown.\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 Late-60s Ultra-Thin Luxury (1967):\u003c\/b\u003e In **1967**—a landmark historical year defined by Japan's peak post-war industrial confidence and rapid modernization—the **Seiko Seikomatic-R** stood as the absolute standard of elegant executive wear. Produced by the **Suwa Seikosha** factory under reference **8305-8031**, this high-end model was engineered for corporate leaders who demanded exceptional mechanical prestige. Representing the elite \"\"R\"\" (Regis\/Refined) lineage, it offered an incredibly flat, comfortable profile that prioritized high-society sophistication over everyday utility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Over-Engineered 30-Jewel Caliber 8305 Automatic Heart:\u003c\/b\u003e This watch is powered by the magnificent **30-jewel Caliber 8305**, a premium ultra-slim automatic movement operating at a classic frequency of **18,000 vibrations per hour (vph)**. In **1967**, deploying an incredibly lavish **30-jewel specification** for a dress watch was a massive statement of micro-engineering prowess. Utilizing a vast array of synthetic rubies to secure the gear-train pivots and minimize auto-winding friction, this caliber allowed Suwa to construct a remarkably thin case without sacrificing mechanical stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8031\"\" Low-Profile Minimally Faceted Case Geometry:\u003c\/b\u003e The reference **8305-8031** is highly 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 straight lugs** finished with zero-distortion mirror polishing. This low-slung, ultra-low center-of-gravity geometric structure allowed the watch to sit entirely flush against the skin, sliding completely weightless and effortlessly under a tailored executive shirt cuff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eImmaculate Dial Clarity and Calendar Refinement:\u003c\/b\u003e The dial of the **8305-8031** is a study in clinical mid-century luxury, showcasing a radiant silver sunburst canvas decorated with **hand-applied, multifaceted elongated block indices**. The clean, uncompromised face features a beautifully framed date window at 3 o'clock, creating a perfect visual balance. The dial is proudly signed with the iconic, stylized cursive **\"\"Seikomatic-R\"\" script**, guaranteeing its elite internal engineering pedigree.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAn Investment-Grade Masterpiece of Suwa's Elegant Legacy:\u003c\/b\u003e Manufactured in the milestone mechanical year of **1967**, the 8305-8031 30-jewel variant remains a highly coveted cornerstone reference for serious vintage Seiko collectors worldwide. It represents the perfect historical intersection where rugged daily durability met late-1960s sharp case finishing and traditional automatic efficiency 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 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\/g1234703232.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":52078120599873,"sku":"g1234703232","price":64400.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_60c70d5b-c44b-4aa2-839c-9f5bb8e2354a.jpg?v=1786515582","url":"https:\/\/nonkun.com\/products\/vintage-1967-japan-seiko-seikomatic-r-8305-8031-30jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}