{"product_id":"vintage-1967-japan-seiko-business-a-8306-9030-30jewels-automatic","title":"Vintage 1967 JAPAN SEIKO BUSINESS-A 8306-9030 30Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1967 JAPAN SEIKO BUSINESS-A 8306-9030 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\u003eBUSINESS-A 8306-9030 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 : BUSINESS-A.\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 : 7125365.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 8306-9040R AD.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\u003c\/li\u003e\n\u003cli\u003eCase size : About 37.49mm.\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 week : Iteration the hour hand at 9:00 and 12:00.\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 1967 Corporate Executive Luxury (1967):\u003c\/b\u003e Manufactured in **1967**—a landmark year during Japan's high-growth economic miracle—the **Seiko Business-A (Business Automatic)** reference **8306-9030** represented Suwa Seikosha's premium executive dress watch line. Created specifically for senior managers and corporate leaders, this high-jewel iteration delivered an exceptional balance of refined aesthetic detail and sophisticated automatic engineering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Over-Engineered Ultra-High 30-Jewel Caliber 8306 Engine:\u003c\/b\u003e Powering this historic timepiece is the rare, top-tier **30-jewel Caliber 8306A**, an in-house automatic engine operating at a steady frequency of **18,000 vibrations per hour (vph)**. Pushing mechanical luxury to its upper limits, the extraordinary **30-jewel count** provided maximum synthetic ruby protection across gear-train pivots and rotor components, while featuring **hacking seconds**, quick-set date control, and manual-winding capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"9030\"\" Broad-Shouldered Case Geometry:\u003c\/b\u003e Sourced in a solid stainless steel case, the reference **8306-9030** features a classic mid-1960s dress profile with sweeping lug chamfers and broad zero-distortion mirror-polished bevels. Built in accordance with early **\"\"Grammar of Design\"\"** principles, the low-profile case integrates clean lines engineered to slide seamlessly under formal dress shirts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMasterful Executive Calendar Dial Layout and High-Jewel Branding:\u003c\/b\u003e The dial of the **8306-9030** exhibits outstanding visual balance, displaying a radiant silver sunburst canvas set with **hand-applied, multifaceted rectangular hour indices**. The distinct calendar aperture layout displays a clear date wheel alongside day functionality, perfectly offset by the script **\"\"Business-A\"\"** logo and the prominent **\"\"30 JEWELS\"\"** designation above 6 o'clock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAn Investment-Grade Masterpiece of Suwa's Business-A Lineage:\u003c\/b\u003e Produced during the prime mechanical manufacturing year of **1967**, the 8306-9030 30-jewel Business-A stands as an uncommonly high-grade, universally respected cornerstone reference for vintage Seiko purists. It captures the exact historical moment where Seiko crafted purpose-built luxury watches for Japan's rising corporate elite.\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\/n1231972434.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":52199738900801,"sku":"n1231972434","price":58300.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_adcd6797-6a8a-4f78-ba19-fa2599e284ff.jpg?v=1789085389","url":"https:\/\/nonkun.com\/en\/products\/vintage-1967-japan-seiko-business-a-8306-9030-30jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}