{"product_id":"vintage-seiko-sea-lion-m77-8306-1000","title":"Vintage Seiko Sea Lion M77 8306-1000","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 8306-1000 is a classic mid-1960s automatic wristwatch powered by Seiko's respected 30-jewel Caliber 8306A movement with day and date display. Combining reliable Japanese engineering with timeless vintage styling, it remains a favorite among collectors of early Seiko automatic watches.\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\"\u003e07102026134236\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\"\u003eSea Lion M77\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\"\u003e8306-1000\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\"\u003e1966\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\"\u003eGrey\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\"\u003eAutomatic\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\"\u003e8306A\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\"\u003eMen's\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\"\u003e30\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\"\u003eLeather: Black Crocodile \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\"\u003eMen\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=\"conditionoverall\"\u003e\n\u003cdiv class=\"spec-label\"\u003eOverall Condition\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eFair, overall condition\u003c\/div\u003e\n\u003c\/div\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        \u003cdiv class=\"spec-row\" data-field=\"crystal\"\u003e\n\u003cdiv class=\"spec-label\"\u003eCrystal\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eShows hairline scratches.\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \n        \n        \n        \n        \n        \n        \n        \u003cdiv class=\"spec-row\" data-field=\"function\"\u003e\n\u003cdiv class=\"spec-label\"\u003eFunction\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eRunning, but may be in need of service. This means, it can run unreliably, start or stop and timekeeping is not guaranteed\u003c\/div\u003e\n\u003c\/div\u003e\n        \n        \u003cdiv class=\"spec-row\" data-field=\"timing\"\u003e\n\u003cdiv class=\"spec-label\"\u003eTiming Data\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003eMinus 65 Seconds\/day, 246 Amp, 1.2 BE\u003c\/div\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"spec-row\" data-field=\"complications\"\u003e\n\u003cdiv class=\"spec-label\"\u003eComplications\u003c\/div\u003e\n\u003cdiv class=\"spec-value\"\u003e Day-Date.\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\"\u003e37mm\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\"\u003e11mm\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\"\u003e20mm\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        \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":49913207488755,"sku":"07102026134236","price":275.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/5355\/3139\/files\/1783712255102_1xnezz_IMG_3306.jpg?v=1784007906","url":"https:\/\/thewatchpreserve.com\/products\/vintage-seiko-sea-lion-m77-8306-1000","provider":"thewatchpreserve","version":"1.0","type":"link"}