{"product_id":"vintage-1969-japan-seiko-51-presmatic-weekdater-5146-7000-27jewels-automatic","title":"Vintage 1969 JAPAN SEIKO 51 PRESMATIC WEEKDATER 5146-7000 27Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1969 JAPAN SEIKO 51 PRESMATIC WEEKDATER 5146-7000 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\u003e51 PRESMATIC WEEKDATER 5146-7000 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 : 51 SEIKO PRESMATIC WEEKDATER .\u003c\/li\u003e\n\u003cli\u003eCaliber number : 5146A.\u003c\/li\u003e\n\u003cli\u003eMovement : Automatic.\u003c\/li\u003e\n\u003cli\u003eBeat rate : 28800bph.\u003c\/li\u003e\n\u003cli\u003eYear of manufacture start : 1969's.\u003c\/li\u003e\n\u003cli\u003eFactory : Kameido.\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 : 970728.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 5146-7000R.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\u003c\/li\u003e\n\u003cli\u003eCase size : About 40.5mm.\u003c\/li\u003e\n\u003cli\u003eLug width : 18mm.\u003c\/li\u003e\n\u003cli\u003eBand : Wrist size that can be worn is Up to about 192mm.\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 days of the week : Iteration the hour hand at 8:00 to 12:00. \u003cbr\u003eSet of the date: Press 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 Milestone of Late-60s Executive Innovation (1969):\u003c\/b\u003e In **1969**—a monumental historic year highlighted by global technological breakthroughs and Japan's peak post-war industrial confidence—the **Seiko 51 Presmatic** represented the absolute pinnacle of mid-century technical elegance. Born from the legendary **Daini Seikosha (Kameido)** factory under reference **5146-7000**, this upscale model was explicitly drawn for the nation's rising executive class. Positioned to deliver chronometer-level performance, it offered ambitious Showa-era business leaders unparalleled mechanical prestige and distinctive micro-engineering flair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Magnificent 27-Jewel Caliber 5146 High-Beat Heart:\u003c\/b\u003e This watch is powered by the highly advanced **27-jewel Caliber 5146**, a premium in-house automatic movement operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Highly revered by vintage horological purists for its exceptionally slim architecture and robust build quality, this caliber tames gear-train friction by deploying a luxurious **27-jewel specification**. It integrates a smooth sweeping seconds configuration alongside an advanced **seconds-hacking mechanism** for precise time setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Revolutionary Hexagonal Press-Crown Quick-Set Mechanism:\u003c\/b\u003e The defining characteristic of the 51 Presmatic line is its namesake, highly advanced **\"\"Presmatic\"\" date quick-set feature**. Built with an ingenious hexagonal time-setting crown that integrates an independent, spring-loaded center push-button, the user could instantly advance the inner date disk forward by one day by simply depressing the center of the crown. The dial houses a beautifully framed dual-calendar window at 3 o'clock featuring a **bilingual (English\/Kanji) day disk**, prioritizing instant split-second legibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eA Sovereign Cornerstone of Kameido's Automatic Legacy:\u003c\/b\u003e Manufactured in the milestone mechanical year of **1969**, the 5146-7000 27-jewel variant remains a highly coveted, investment-grade reference for serious collectors worldwide. It represents the perfect historical intersection where rugged daily durability met late-1960s sharp case finishing and elite high-frequency micro-engineering right before the quartz transition. Built to an uncompromising heirloom standard, it stands as a profound testament to an era when Kameido perfected the high-utility daily business 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\/k1233451670.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":52078116700481,"sku":"k1233451670","price":78100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_f82df24c-66c5-4168-9c4e-394fce13b748.jpg?v=1786515465","url":"https:\/\/nonkun.com\/products\/vintage-1969-japan-seiko-51-presmatic-weekdater-5146-7000-27jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}