{"product_id":"vintage-1969-japan-seiko-seikomatic-p-weekdater-5106-8020-33jewels-automatic","title":"Vintage 1969 JAPAN SEIKO SEIKOMATIC-P WEEKDATER 5106-8020 33Jewels Automatic.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1969 JAPAN SEIKO SEIKOMATIC-P WEEKDATER 5106-8020 33Jewels 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-P WEEKDATER 5106-8020 33Jewels \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 SEIKOMATIC-P WEEKDATER .\u003c\/li\u003e\n\u003cli\u003eCaliber No. : 5106A.\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 : 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 No. : 970878.\u003c\/li\u003e\n\u003cli\u003eDial No. : JAPAN 5106-8031T.\u003c\/li\u003e\n\u003cli\u003eGlass : Crystal.\u003c\/li\u003e\n\u003cli\u003eCase size : About 38.83mm.\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\u003eQuick set(Day\/Date) : Okay. \u003cbr\u003eSet the day of the week : English only.\u003cbr\u003eSet the date: 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\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eThe Sovereign Peak of Late-60s Business Automatic Innovation (1968):\u003c\/b\u003e Manufactured in \u003cb\u003e1968\u003c\/b\u003e—a monumental year during Japan's mid-Showa industrial boom—the \u003cb\u003eSeiko Seikomatic-P Weekdater\u003c\/b\u003e reference \u003cb\u003e5106-8020\u003c\/b\u003e represented Daini Seikosha's technological masterwork in executive automatic horology. The \"\"P\"\" (Presmatic) designation signified a high-spec, feature-rich mechanical platform developed specifically to rival Suwa Seikosha's top-tier business lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Over-Engineered 33-Jewel Caliber 5106 Presmatic Engine:\u003c\/b\u003e Powering this historic instrument is the ultra-sophisticated \u003cb\u003e33-jewel Caliber 5106A\u003c\/b\u003e, an in-house automatic engine operating at a frequency of \u003cb\u003e19,800 vibrations per hour (vph)\u003c\/b\u003e. Featuring an extravagant \u003cb\u003e33-jewel specification\u003c\/b\u003e to eliminate gear-train friction, this movement is globally famous for its unique \u003cb\u003ehexagonal central push-button crown\u003c\/b\u003e, which allows instant quick-setting of the date disk by depressing the crown center, alongside \u003cb\u003ehacking seconds\u003c\/b\u003e and hand-winding capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8020\"\" Grammar of Design Cushion Case:\u003c\/b\u003e The reference \u003cb\u003e5106-8020\u003c\/b\u003e is globally distinguished among vintage Seiko collectors for its beautifully contoured cushion-style stainless steel case. Executed with sharp angular facets, broad brushed surfaces, and zero-distortion mirror-polished Zaratsu edge bevels inspired by Taro Tanaka's \u003cb\u003e\"\"Grammar of Design\"\"\u003c\/b\u003e guidelines, the case rests flush and ergonomically balanced against the wrist.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMasterful \"\"Weekdater\"\" Dial Harmony and Fine Typography:\u003c\/b\u003e The dial of the \u003cb\u003e5106-8020\u003c\/b\u003e showcases exemplary late-1960s visual balance, featuring a radiant silver sunburst canvas decorated with \u003cb\u003ehand-applied, multifaceted rectangular block indices\u003c\/b\u003e and sharp dauphine hands. Symmetrically framed at 3 o'clock, the dual-calendar aperture displays the day and date wheels, proudly adorned with applied \u003cb\u003e\"\"SEIKOMATIC-P\"\"\u003c\/b\u003e typography and the \u003cb\u003e\"\"33 JEWELS\"\"\u003c\/b\u003e designation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAn Investment-Grade Masterpiece of Daini's Mechanical Heritage:\u003c\/b\u003e Manufactured in the landmark mechanical year of \u003cb\u003e1968\u003c\/b\u003e, the 5106-8020 33-jewel Seikomatic-P Weekdater remains a highly sought-after, universally respected reference for serious vintage Seiko collectors worldwide. Representing the absolute peak of Daini Seikosha's late-60s automatic engineering, it stands as an eternal heirloom of Japanese horological history.\u003c\/li\u003e\n\u003c\/ul\u003e\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\/o1243643810.jpg\"\u003e\u003c\/div\u003e\u003c\/dd\u003e\n\u003cdt style=\"font-size: 24px;font-weight: bolder;\"\u003eNotes\u003c\/dt\u003e\n\u003cdd style=\"margin-left: 16px;\"\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":67900893790529,"sku":"o1243643810","price":83200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_36d425f9-e811-4611-8780-c43cbed144a3.jpg?v=1792230223","url":"https:\/\/nonkun.com\/products\/vintage-1969-japan-seiko-seikomatic-p-weekdater-5106-8020-33jewels-automatic","provider":"NONKUN Japan","version":"1.0","type":"link"}