{"product_id":"serviced-vintage-1974-japan-seiko-lord-matic-weekdater-5606-8030-25j-automatic-1","title":"Serviced Vintage 1974 JAPAN SEIKO LORD MATIC WEEKDATER 5606-8030 25J Automatic.","description":"\u003cdiv style=\"display: none;\"\u003e\n\u003ch1\u003eServiced Vintage 1974 JAPAN SEIKO LORD MATIC WEEKDATER 5606-8030 25J Automatic.\u003c\/h1\u003e\nServiced Vintage 1974 JAPAN SEIKO LORD MATIC WEEKDATER 5606-8030 25Jewels Automatic.Welcome to my auction!I am Japanese who live in Tokyo. Item description It's a SEIKO Automatic Watch, LORD MATIC WEEKDATER 5606-8030 25Jewels . It's in good used condition. It's difficult to find this valuable watch in such a good condition. Highly recommended for SEIKO collectors! Movement : Pet name : 56 LORD MATIC WEEKDATER .Caliber number : 5606A.Movement : Automatic.Beat rate : 21600bph.Year of manufacture start : 1968's.Factory : Suwa.Externals : Serial number : 402892.Dial number : JAPAN5606-8060T.Glass : Crystal.Case size : About 36.6mm.Lug width : 19mm.Band : Wrist size that can be worn is Up to about 180mm.Condition : Used, it runs well.Quick set(Day\/Date) : Okay. Set the day of the week can be in English or Japanese. Set of the date : The set at one stage pulling the crown.The day difference time of an used watch is about +-1 minute \/ day.Overhaul service in July 2026.The movement has been cleaned and oiled, so it works fine.Key Features The Era of Refined 1974 Corporate Sophistication (1974): In **1974**, the **Seiko Lord Matic (LM)** served as a premier timekeeping statement for Japan's high-ranking corporate executives and modern white-collar class. The reference **5606-8030** was produced by the **Suwa Seikosha** factory during a mature historical period when mechanical watchmaking reached its structural peak to confidently protect its prestige alongside the rapid rise of early quartz technology. It offered the ambitious Showa-era professional a perfect blend of high-end mechanical slimness and clinical corporate styling. The Upgraded 25-Jewel Caliber 5606 High-Grade Heart: This watch is powered by the rare, high-grade **25-jewel Caliber 5606**, an ultra-slim automatic movement operating at **21,600 vibrations per hour (vph)**. While the standard mainstream Lord Matic models utilized a 23-jewel layout, this elite **25-jewel specification** was reserved for premium factory runs, deploying extra synthetic rubies to minimize friction within the gear train and calendar works. It integrates executive functions such as **hacking seconds**, manual winding, and a robust dual-calendar quick-set. Architectural \"\"8030\"\" Grammar of Design Case Geometry: The reference **5606-8030** is highly celebrated among vintage purists as a definitive and masterful execution of Seiko's legendary **\"\"Grammar of Design\"\"** philosophy. The stainless steel case features incredibly sharp, angular facets and robust, integrated lug profiles finished with a beautiful play of mirror-polished surfaces and precise vertical brushwork. This low center-of-gravity geometry maximized executive wrist presence while maintaining a sleek, low-profile silhouette that sat flush under a tailored dress sleeve. Masterful \"\"Weekdater\"\" Dial Purity and Symmetry: The dial of the **5606-8030** is a study in mid-century clinical luxury, showcasing a radiant sunburst silver finish and **hand-applied, multi-faceted baton indices** that cast sharp reflections under light. The dual-calendar window at 3 o'clock houses a **bilingual (English\/Kanji) day disk**, prioritizing instant everyday legibility for the modernizing Japanese workforce. The applied, interlocking **\"\"LM\"\" emblem** and the Suwa lightning bolt insignia at 6 o'clock remain proud hallmarks of pure industrial pride. A Landmark of Suwa's High-Spec Mechanical Legacy: Produced in the milestone year of **1974**, the 5606-8030 25-jewel variant remains a highly coveted, investment-grade reference for serious collectors who value the **\"\"Mechanical Golden Age.\"\"** It represents the perfect historical intersection where rugged daily durability met the absolute peak of mid-century minimalist architectural design and high-jewel micro-engineering. It stands as a profound testament to an era when Suwa Seikosha perfected the **\"\"Deluxe Executive Daily Instrument\"\"** for the global stage. For more information, please look at the pictures. Notes Before buying.The 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. To prevent shipping accidents.Please 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. About import taxes.Taxes 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. About Payment, Shipping, Return.Payment, Shipping, Return are in accordance with eBay's business policies. \u003c\/div\u003e\n\n\n\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eServiced Vintage 1974 JAPAN SEIKO LORD MATIC WEEKDATER 5606-8030 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 SEIKO Automatic Watch, \u003cb\u003eLORD MATIC WEEKDATER 5606-8030 25Jewels \u003c\/b\u003e.\u003cbr\u003e\n\u003cb\u003eIt's in good uséd 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 : 56 LORD MATIC WEEKDATER .\u003c\/li\u003e\n\u003cli\u003eCaliber number : 5606A.\u003c\/li\u003e\n\u003cli\u003eMovement : Automatic.\u003c\/li\u003e\n\u003cli\u003eBeat rate : 21600bph.\u003c\/li\u003e\n\u003cli\u003eYear of manufacture start : 1968'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 : 402892.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN5606-8060T.\u003c\/li\u003e\n\u003cli\u003eGlass : Crystal.\u003c\/li\u003e\n\u003cli\u003eCase size : About 36.6mm.\u003c\/li\u003e\n\u003cli\u003eLug width : 19mm.\u003c\/li\u003e\n\u003cli\u003eBand : Wrist size that can be worn is Up to about 180mm.\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\u003eUséd, 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 Japanese. \u003cbr\u003eSet of the date : The set at one stage pulling the crown.\u003c\/li\u003e\n\u003cli\u003eThe day difference time of an uséd watch is about +-1 minute \/ day.\u003c\/li\u003e\n\u003cli\u003e\u003cb style=\"color : red\"\u003eOverhaul service in July  2026.\u003cbr\u003eThe movement has been cleaned and oiled, so it works fine.\u003c\/b\u003e\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 Era of Refined 1974 Corporate Sophistication (1974):\u003c\/b\u003e In **1974**, the **Seiko Lord Matic (LM)** served as a premier timekeeping statement for Japan's high-ranking corporate executives and modern white-collar class. The reference **5606-8030** was produced by the **Suwa Seikosha** factory during a mature historical period when mechanical watchmaking reached its structural peak to confidently protect its prestige alongside the rapid rise of early quartz technology. It offered the ambitious Showa-era professional a perfect blend of high-end mechanical slimness and clinical corporate styling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Upgraded 25-Jewel Caliber 5606 High-Grade Heart:\u003c\/b\u003e This watch is powered by the rare, high-grade **25-jewel Caliber 5606**, an ultra-slim automatic movement operating at **21,600 vibrations per hour (vph)**. While the standard mainstream Lord Matic models utilized a 23-jewel layout, this elite **25-jewel specification** was reserved for premium factory runs, deploying extra synthetic rubies to minimize friction within the gear train and calendar works. It integrates executive functions such as **hacking seconds**, manual winding, and a robust dual-calendar quick-set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8030\"\" Grammar of Design Case Geometry:\u003c\/b\u003e The reference **5606-8030** is highly celebrated among vintage purists as a definitive and masterful execution of Seiko's legendary **\"\"Grammar of Design\"\"** philosophy. The stainless steel case features incredibly sharp, angular facets and robust, integrated lug profiles finished with a beautiful play of mirror-polished surfaces and precise vertical brushwork. This low center-of-gravity geometry maximized executive wrist presence while maintaining a sleek, low-profile silhouette that sat flush under a tailored dress sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMasterful \"\"Weekdater\"\" Dial Purity and Symmetry:\u003c\/b\u003e The dial of the **5606-8030** is a study in mid-century clinical luxury, showcasing a radiant sunburst silver finish and **hand-applied, multi-faceted baton indices** that cast sharp reflections under light. The dual-calendar window at 3 o'clock houses a **bilingual (English\/Kanji) day disk**, prioritizing instant everyday legibility for the modernizing Japanese workforce. The applied, interlocking **\"\"LM\"\" emblem** and the Suwa lightning bolt insignia at 6 o'clock remain proud hallmarks of pure industrial pride.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eA Landmark of Suwa's High-Spec Mechanical Legacy:\u003c\/b\u003e Produced in the milestone year of **1974**, the 5606-8030 25-jewel variant remains a highly coveted, investment-grade reference for serious collectors who value the **\"\"Mechanical Golden Age.\"\"** It represents the perfect historical intersection where rugged daily durability met the absolute peak of mid-century minimalist architectural design and high-jewel micro-engineering. It stands as a profound testament to an era when Suwa Seikosha perfected the **\"\"Deluxe Executive Daily Instrument\"\"** for the global stage.\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\/x1230927417.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\u003cdiv style=\"text-align:center; background:#fff; padding:5px 0px 5px 0px; clear:both; width:100%;\"\u003e\n\u003cdiv style=\"padding-bottom:5px;\"\u003e\n\u003cspan\u003eeBay integration\u003c\/span\u003e by \u003c\/div\u003e\n\u003cimg width=\"120\" src=\"https:\/\/d31wxntiwn0x96.cloudfront.net\/ayjjhk\/\/images\/codisto-connect.png?width=200\u0026amp;nostretch\u0026amp;v=1\"\u003e\n\u003c\/div\u003e","brand":"NONKUN Japan","offers":[{"title":"Default Title","offer_id":52080601661761,"sku":"x1230927417","price":52400.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_5746e476-f86e-4177-9ee9-c9102bd4b8fa.jpg?v=1786597832","url":"https:\/\/nonkun.com\/products\/serviced-vintage-1974-japan-seiko-lord-matic-weekdater-5606-8030-25j-automatic-1","provider":"NONKUN Japan","version":"1.0","type":"link"}