{"product_id":"1971-zenith-el-primero-a3817","title":"1971 Zenith El Primero A3817","description":"\u003cp\u003eInformation:\u003c\/p\u003e\n\u003cp\u003eReference: \u003cmeta charset=\"utf-8\"\u003e\u003cspan data-sheets-root=\"1\"\u003eA3817\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eDated: Undated\u003c\/p\u003e\n\u003cp\u003eSerial: \u003cmeta charset=\"utf-8\"\u003e\u003cspan data-sheets-root=\"1\"\u003e904D8XX\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eProduction Amount: 1000 Pieces\u003c\/p\u003e\n\u003cp\u003eBracelet: Original Black Leather Zenith Strap with Zenith Buckle\u003c\/p\u003e\n\u003cp\u003eCase: 37mm - Stainless Steel\u003c\/p\u003e\n\u003cp\u003eDial\/hands: Tritium\u003c\/p\u003e\n\u003cp\u003eMovement: El Primero 3019 PHC - Automatic\u003c\/p\u003e\n\u003cp\u003eFunctions: HMS, Date, Chronograph\u003c\/p\u003e\n\u003cp\u003eBox and Papers: Inner box, and warranty papers\u003c\/p\u003e\n\u003cp\u003eCrystal: Acrylic\u003c\/p\u003e\n\u003cp\u003eCase back: SP 1301 - Spillman Case back\u003c\/p\u003e\n\u003cp\u003eBracelet size: 7.5\"\u003c\/p\u003e\n\u003cp\u003eCondition:\u003c\/p\u003e\n\u003cp\u003eSharp unpolished case has minimal light wear with only a few light scratches. Original Zenith strap and buckle have minimal wear or creasing. Dial and hands are free of wear. Case back does have the engraving \"MARK T. O'Brien - June 77 DAD + MOM\". No service history running (-4 s\/d 222 amp).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Zenith\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eZenith\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewas founded in 1865 by Georges Favre-Jacot in Le Locle, Switzerland, and is celebrated as one of the first watch manufactures to fully integrate every aspect of production under one roof. This groundbreaking approach laid the foundation for over a century of innovation and precision. Zenith’s most iconic achievement came in 1969 with the launch of the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEl Primero\u003c\/strong\u003e, one of the world’s first automatic chronograph movements—and still one of the most accurate, beating at an impressive 36,000 vibrations per hour. This movement would go on to power legendary models and even find its way into watches by other major Swiss brands.\u003c\/p\u003e\n\u003cp\u003eZenith’s current lineup honors its legacy while embracing modernity. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eChronomaster\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eseries continues to showcase the high-frequency prowess of the El Primero, offering split-second accuracy and open-heart dial designs. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDefy\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecollection pushes the brand into futuristic territory with skeletonized dials, cutting-edge materials, and innovative escapements. Meanwhile, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePilot\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eline draws on Zenith’s history of aviation timepieces, featuring oversized crowns and vintage-inspired aesthetics. Known for its relentless pursuit of precision and its role in shaping the future of Swiss watchmaking,  Zenith remains popular amongst collectors who value performance, heritage, and technical artistry in equal measure.\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e","brand":"Pre-Owned","offers":[{"title":"Default Title","offer_id":67753854238940,"sku":"260803","price":22250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0518\/0214\/4926\/files\/1971ZenithElPrimeroA3817DSC00115.jpg?v=1792084021","url":"https:\/\/www.belmontwatches.com\/products\/1971-zenith-el-primero-a3817","provider":"Belmont Watches","version":"1.0","type":"link"}