{"product_id":"vintage-1968-japan-seiko-bell-matic-weekdater-4006-7000-27jewels-automatic","title":"Vintage 1968 JAPAN SEIKO BELL-MATIC WEEKDATER 4006-7000 27Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1968 JAPAN SEIKO BELL-MATIC WEEKDATER 4006-7000 27Jewels 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\u003eBELL-MATIC WEEKDATER 4006-7000 27Jewels \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 : SEIKO BELL-MATIC WEEKDATER BUSINESS BELL .\u003c\/li\u003e\n\u003cli\u003eCaliber number : 4006A.\u003c\/li\u003e\n\u003cli\u003eMovement : Automatic.\u003c\/li\u003e\n\u003cli\u003eBeat rate : 19800bph.\u003c\/li\u003e\n\u003cli\u003eYear of manufacture start : 1967'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 : 889924.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 4006-7070T AD.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\u003c\/li\u003e\n\u003cli\u003eCase size : About 38.37mm.\u003c\/li\u003e\n\u003cli\u003eLug width : 18mm.\u003c\/li\u003e\n\u003cli\u003eBand : New Leather Strap of SEIKO original.\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 of the days of the week : Iteration the hour hand at 10:00 and 1:00\u003cbr\u003eSet of the date: Press the button near the 3:00 position. \u003cbr\u003eInternal bezel Set : The set at one stage pulling the crown.\u003cbr\u003eBell Set:Pull the button near the 3:00 position. \u003cbr\u003eCrown\/pushers: Excellent Condition.\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 1968 Mechanical Alarm Innovation (1968):\u003c\/b\u003e Manufactured in **1968**—a historic milestone year during Japan's mid-Showa industrial boom—the **Seiko Bell-Matic Weekdater** represented Suwa Seikosha's ultimate mechanical marvel for high-society executives. Sourced under reference **4006-7000**, this flagship mechanical alarm instrument allowed global travelers and business leaders to set precise audio reminders, serving as an authoritative status symbol of modern Japanese horological ingenuity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Ultra-Rare 27-Jewel Caliber 4006 Automatic Heart:\u003c\/b\u003e Powering this historic timepiece is the highly coveted **27-jewel Caliber 4006A**, an in-house automatic engine operating at a classic frequency of **19,800 vibrations per hour (vph)**. Equipping an automatic alarm watch in **1968** with a lavish **27-jewel specification** was a monumental statement of micro-engineering prowess (shortly before tariff restrictions reduced later export versions to 17 jewels). It features a dedicated alarm spring barrel wound manually via the primary crown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIntegrated Mechanical Alarm Ring and Inner Bezel Geometry:\u003c\/b\u003e A defining technological triumph of the 4006 movement is its crisp, audible mechanical alarm. Operated via the 2 o'clock crown-pusher (which arms\/disarms the hammer mechanism), the wearer turns the crown in position zero to position the internal **rotating alarm bezel cursor** to the desired hour. When triggered, a dedicated internal striker hits a tuned steel sound-post, producing a distinctive, energetic ringing buzz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"7000\"\" Cushion Case and Dial Balance:\u003c\/b\u003e The reference **4006-7000** is globally distinguished among vintage collectors for its robust, broad-shouldered **cushion case architecture** featuring sweeping polished contours inspired by Taro Tanaka's **\"\"Grammar of Design\"\"** guidelines. The radiant silver sunburst dial showcases **hand-applied, multifaceted hour indices** and sharp hands. Symmetrically framed at 3 o'clock, the dual-calendar window houses a **bilingual day disk** alongside a quick-set date function operated by depressing the 2 o'clock pusher.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAn Investment-Grade Treasure of Suwa's Mechanical Legacy:\u003c\/b\u003e Manufactured in the milestone mechanical year of **1968**, the early-production 27-jewel 4006-7000 Bell-Matic remains one of the rarest, most historically significant wrist-alarm references produced by Seiko. It captures the exact historical moment where Suwa Seikosha mastered complex horological complications right before the quartz era. Built to an uncompromising heirloom standard, it stands as an eternal testament to mid-century mechanical design.\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\/j1236792142.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":52078120403265,"sku":"j1236792142","price":129900.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_975eec93-4093-4335-82a2-b5c20a661612.jpg?v=1786515573","url":"https:\/\/nonkun.com\/products\/vintage-1968-japan-seiko-bell-matic-weekdater-4006-7000-27jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}