{"product_id":"vintage-1971-japan-seiko-skyliner-6100-8000-21jewels-hand-winding","title":"Vintage 1971 JAPAN SEIKO SKYLINER 6100-8000 21Jewels Hand-winding.","description":"\u003cbr\u003e\u003ch3 style=\"font-size: 32px; color : #2B0000; margin-bottom: 36px;\"\u003eVintage 1971 JAPAN SEIKO SKYLINER 6100-8000 21Jewels Hand-winding.\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 Hand-winding Watch, \u003cb\u003eSKYLINER 6100-8000 21Jewels \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 : 61 SKYLINER .\u003c\/li\u003e\n\u003cli\u003eCaliber number : 61A.\u003c\/li\u003e\n\u003cli\u003eMovement : Hand-winding.\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 : 1D1785.\u003c\/li\u003e\n\u003cli\u003eDial number : JAPAN 61-8000T.\u003c\/li\u003e\n\u003cli\u003eGlass : Acrylic.\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.\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\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 Benchmark of 1971 Slim Manual-Wind Luxury (1971):\u003c\/b\u003e Manufactured in **1971**—a monumental historic year during Japan's mid-Showa industrial boom—the **Seiko Skyliner** reference **6100-8000** represented Suwa Seikosha's definitive answer for an ultra-slim, non-date manual-wind dress watch. Positioned as an elegant alternative to heavy automatic models, the Skyliner line offered refined, minimalist sophistication for corporate executives during the peak era of mechanical Japanese watchmaking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThe Over-Engineered 21-Jewel Caliber 6100 Manual Heart:\u003c\/b\u003e Powering this historic timepiece is the revered **21-jewel Caliber 6100A**, an in-house manual-wind engine operating at a smooth frequency of **21,600 vibrations per hour (vph)**. Celebrated by vintage purists for its robust construction and ultra-thin profile, this caliber deploys a lavish **21-jewel specification** across its gear-train pivots to minimize mechanical wear, equipped with Seiko's proprietary **Diashock** shock-protection system for long-term rate stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eArchitectural \"\"8000\"\" Grammar of Design Case Geometry:\u003c\/b\u003e The reference **6100-8000** is globally distinguished among collectors for its strict adherence to Taro Tanaka's **\"\"Grammar of Design\"\"** philosophy. Executed in solid stainless steel, the case features flat, zero-distortion mirror-polished Zaratsu planes, sharp-angled lug facets, and a sleek, low-profile bezel. This slim architectural geometry allows the mechanical instrument to rest completely flush against the wrist, sliding weightlessly under a tailored cuff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eImmaculate Non-Date Dial Symmetry and Fine Cursive Typography:\u003c\/b\u003e The dial of the **6100-8000** is a masterclass in early-1970s visual restraint. Free from calendar aperture clutter, the brilliant silver sunburst canvas showcases **hand-applied, multifaceted rectangular block indices** with a prominent double index at 12 o'clock and razor-sharp dauphine hands. The lower dial is gracefully adorned with the iconic stylized **\"\"Skyliner\"\"** cursive typography and the Suwa Seikosha factory crest above 6 o'clock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAn Investment-Grade Masterpiece of Suwa's Manual Legacy:\u003c\/b\u003e Produced during the milestone mechanical year of **1971**, the 6100-8000 21-jewel Seiko Skyliner remains an uncommonly clean, highly sought-after cornerstone reference for serious vintage Seiko purists. Capturing the precise historical moment where Suwa Seikosha perfected high-utility manual-wind dress watches before the global shift into quartz technology, it stands as an eternal, heirloom-quality piece of Japanese horological history.\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\/f1242094271.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":67582667948353,"sku":"f1242094271","price":71800.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/8205\/0625\/files\/57_f350a2f1-780a-4709-b803-cc08f618d4dd.jpg?v=1790488886","url":"https:\/\/nonkun.com\/products\/vintage-1971-japan-seiko-skyliner-6100-8000-21jewels-hand-winding","provider":"NONKUN Japan","version":"1.0","type":"link"}