{"product_id":"vintage-1973-japan-grand-seiko-weekdater-5646-7011-25jewels-automatic","title":"Vintage 1973 JAPAN GRAND SEIKO WEEKDATER 5646-7011 25Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1973 JAPAN GRAND SEIKO WEEKDATER 5646-7011 25Jewels 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 Automatic Watch, \u003cb\u003eGRAND SEIKO WEEKDATER 5646-7011 25Jewels \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 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 : 56 GRAND SEIKO WEEKDATER .\u003c\/li\u003e\n\u003cli\u003eCaliber number : 5646A.\u003c\/li\u003e\n\u003cli\u003eMovement : Automatic.\u003c\/li\u003e\n\u003cli\u003eBeat rate : 28800bph.\u003c\/li\u003e\n\u003cli\u003eYear of manufacture start : 1970'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 : 3N0730.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 5646-7010T.\u003c\/li\u003e\n\u003cli\u003eGlass : Crystal.\u003c\/li\u003e\n\u003cli\u003eCase size : About 36.8mm.\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 the day of the week can be in English or Kanji. \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 Sovereign Peak of 1973 Grand Seiko Prestige (1973):\u003c\/b\u003e Manufactured in **1973**—a historic year when Japanese mechanical mastery stood at its absolute pinnacle of precision and executive luxury—the **Grand Seiko Weekdater (56GS)** represented the apex of elite dress watchmaking. Born from the **Suwa Seikosha** factory under reference **5646-7011**, this premium automatic timepiece was built to the uncompromising \"\"Grand Seiko Standard.\"\" It served as a proud status symbol for Japan's high-society leaders during the heights of the Showa economic miracle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Elite 25-Jewel Caliber 5646 High-Beat Heart:\u003c\/b\u003e This masterpiece is powered by the magnificent **25-jewel Caliber 5646**, an in-house automatic engine operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Highly celebrated by vintage purists for its remarkably slim architecture and exceptional daily stability, this movement represents the technical zenith of the 56-series automatic lineage. Utilizing a premium **25-jewel specification**, it features executive functions like **hacking seconds** and manual-winding capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"7011\"\" Grammar of Design Case Mastery:\u003c\/b\u003e The reference **5646-7011** is globally sought after for its flawless implementation of Seiko's foundational **\"\"Grammar of Design\"\"** philosophy. The solid stainless steel case features incredibly sharp, muscular facets and robust, beautifully tapered lugs finished with zero-distortion mirror polishing. This low center-of-gravity design allows the watch to sit entirely flush against the skin, sliding effortlessly under a tailored executive shirt cuff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eImmaculate Weekdater Dial Harmony and Bilingual Utility:\u003c\/b\u003e The dial of the 5646-7011 is a masterclass in clinical luxury, showcasing a radiant silver sunburst canvas decorated with **hand-applied, multifaceted elongated indices** and razor-sharp GS-specific hands. Symmetrically balanced at 3 o'clock, the dual-calendar window houses a **bilingual (English\/Kanji) day disk**, prioritizing instant split-second corporate legibility for the globalizing business elite.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Iconic Gold GS Medallion of Mechanical Excellence:\u003c\/b\u003e The ultimate hallmark of this vintage treasure sits proudly on the screw-down case back: a **pristine, gold-embossed Grand Seiko medallion**. This legendary crest historically certified its elite water-resistant status and supreme, factory-regulated timing accuracy. Built to an uncompromising heirloom standard that easily transcends passing fashion trends, this 1973 timepiece stands as an eternal testament to the golden age of Japanese 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\/g1235526774.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":52078115651905,"sku":"g1235526774","price":318200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_a2d13b68-6900-4de5-8235-f0c5212d262e.jpg?v=1786515433","url":"https:\/\/nonkun.com\/products\/vintage-1973-japan-grand-seiko-weekdater-5646-7011-25jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}