{"product_id":"vintage-seiko-kinetic-4m21-ob40","title":"Vintage Seiko Kinetic 4M21-OB40","description":"\u003c!-- VERSION 2: --\u003e\n\u003cstyle\u003e\n.product-details { font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, sans-serif; line-height: 1.6; color: #333; }\n.product-description { font-size: 1rem; line-height: 1.8; color: #333; margin-bottom: 2rem; padding: 1rem; background-color: #f9f9f9; border-left: 3px solid #333; }\n.product-details h2 { font-size: 1.5rem; font-weight: 600; margin-top: 2rem; margin-bottom: 1rem; border-bottom: 1px solid #e0e0e0; padding-bottom: 0.5rem; }\n.product-details h2:first-of-type { margin-top: 0; }\n.spec-table { width: 100%; margin-bottom: 1.5rem; }\n.spec-row { display: flex; padding: 0.75rem 0; border-bottom: 1px solid #f0f0f0; }\n.spec-row:last-child { border-bottom: none; }\n.spec-label { flex: 0 0 180px; font-weight: 500; color: #666; }\n.spec-value { flex: 1; color: #333; }\n.condition-text { margin: 0.5rem 0; line-height: 1.8; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"product-details\"\u003e\n    \u003c!-- DESCRIPTION PARAGRAPH --\u003e\n    \u003cdiv class=\"product-description\" data-field=\"additionallast\"\u003e\n        \u003cp\u003eThe Seiko 4M21-0B40 is an elegant 1990s Kinetic watch powered by Seiko’s innovative 4M21 movement, which converts wrist motion into electrical energy to run a quartz-regulated timekeeping system. Combining traditional watchmaking with advanced technology, it offers reliable accuracy, a slim profile, and a distinctive place in Seiko’s history of battery-free quartz innovation.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- SPECIFICATIONS SECTION --\u003e\n    \u003ch2\u003eSpecifications\u003c\/h2\u003e\n    \u003cdiv class=\"spec-table\"\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"sku\"\u003e\n\u003cdiv class=\"spec-label\"\u003eSKU\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e07212026122039\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"item\"\u003e\n\u003cdiv class=\"spec-label\"\u003eItem\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eWristwatch\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"brand\"\u003e\n\u003cdiv class=\"spec-label\"\u003eBrand\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eSeiko\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"model\"\u003e\n\u003cdiv class=\"spec-label\"\u003eModel\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eKinetic\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"reference\"\u003e\n\u003cdiv class=\"spec-label\"\u003eReference\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e4M21-OB40\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"productionyear\"\u003e\n\u003cdiv class=\"spec-label\"\u003eYear\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e1997\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"dialcolor\"\u003e\n\u003cdiv class=\"spec-label\"\u003eDial Color\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eSilver\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"indices\"\u003e\n\u003cdiv class=\"spec-label\"\u003eIndices\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eBaton Indexes\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"casematerial\"\u003e\n\u003cdiv class=\"spec-label\"\u003eCase Material\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eStainless Steel\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"movement\"\u003e\n\u003cdiv class=\"spec-label\"\u003eMovement\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eQuartz Automatic\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"caliber\"\u003e\n\u003cdiv class=\"spec-label\"\u003eCaliber\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e4M21\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"country\"\u003e\n\u003cdiv class=\"spec-label\"\u003eCountry\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eJapan\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"gender\"\u003e\n\u003cdiv class=\"spec-label\"\u003eGender\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eUnisex\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"jewels\"\u003e\n\u003cdiv class=\"spec-label\"\u003eJewels\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e9\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \u003cdiv class=\"spec-row\" data-field=\"bandmaterial\"\u003e\n\u003cdiv class=\"spec-label\"\u003eBand Material\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eStainless Steel\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \n        \u003cdiv class=\"spec-row\" data-field=\"department\"\u003e\n\u003cdiv class=\"spec-label\"\u003eDepartment\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eUnisex Adults\u003c\/div\u003e\n\u003c\/div\u003e\n        \n    \u003c\/div\u003e\n\n    \u003c!-- CONDITION SECTION --\u003e\n    \u003ch2\u003eCondition\u003c\/h2\u003e\n    \u003cdiv class=\"spec-table\"\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"casecondition\"\u003e\n\u003cdiv class=\"spec-label\"\u003eCase\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eShows scratches.\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \n        \n        \n        \n        \n        \n        \n        \u003cdiv class=\"spec-row\" data-field=\"bandcondition\"\u003e\n\u003cdiv class=\"spec-label\"\u003eBand\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eShows hairline scratches. The bracelet has some stretch between the links.\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"function\"\u003e\n\u003cdiv class=\"spec-label\"\u003eFunction\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eRunning and keeping time\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \n        \u003cdiv class=\"spec-row\" data-field=\"complications\"\u003e\n\u003cdiv class=\"spec-label\"\u003eComplications\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e Kinetic.\u003c\/div\u003e\n\u003c\/div\u003e\n        \n    \u003c\/div\u003e\n\n    \u003c!-- MEASUREMENTS SECTION --\u003e\n    \u003ch2\u003eMeasurements\u003c\/h2\u003e\n    \u003cdiv class=\"spec-table\"\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"diameter\"\u003e\n\u003cdiv class=\"spec-label\"\u003eDiameter\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e33mm\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \n        \n        \n        \u003cdiv class=\"spec-row\" data-field=\"thickness\"\u003e\n\u003cdiv class=\"spec-label\"\u003eThickness\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e7mm\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"lugwidth\"\u003e\n\u003cdiv class=\"spec-label\"\u003eLug Width\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e17mm\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"lugtolug\"\u003e\n\u003cdiv class=\"spec-label\"\u003eLug to Lug\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e41mm\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"braceletsize\"\u003e\n\u003cdiv class=\"spec-label\"\u003eBracelet Size\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e7inch\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \n        \n        \n        \n        \n        \n        \n        \n        \n        \n        \n        \n        \n    \u003c\/div\u003e\n\n    \u003c!-- ABOUT THE BRAND SECTION --\u003e\n    \u003ch2\u003eAbout the Brand\u003c\/h2\u003e\n    \u003cdiv class=\"product-description\" data-field=\"aboutthebrand\"\u003e\n        \u003cp\u003eSeiko: A beloved brand among collectors, Seiko has long been known for offering exceptional watches at accessible prices. Founded in 1881, the Japanese brand earned worldwide recognition for its divers, sports chronographs, and industry-leading quartz technology. With a lineup that includes historically significant and technically innovative pieces, Seiko remains one of the most widely collected and respected watch brands across all price points.\u003c\/p\u003e\n    \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener(\"DOMContentLoaded\",function(){document.querySelectorAll('.product-details h2').forEach(function(h){var n=h.nextElementSibling;if(n\u0026\u0026n.classList.contains('spec-table')\u0026\u0026n.querySelectorAll('.spec-row').length===0){h.style.display='none';n.style.display='none';}});});\n\u003c\/script\u003e","brand":"Seiko","offers":[{"title":"Default Title","offer_id":68833165672691,"sku":"07212026122039","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/5355\/3139\/files\/vintage-1997-seiko-4m21-ob40-kinetic-quartz-automatic-uqoxuirv.jpg?v=1794201033","url":"https:\/\/thewatchpreserve.com\/products\/vintage-seiko-kinetic-4m21-ob40","provider":"thewatchpreserve","version":"1.0","type":"link"}