{"product_id":"zenith-el-primero","title":"Zenith El Primero 1970s","description":"\u003cp\u003e\u003cem\u003eThe world's first automatic chronograph.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReference 20.0210.415\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn January 10, 1969, Zenith unveiled the El Primero, the world's first automatic chronograph. The model presented here dates from the 1970s. \u003cbr\u003eDespite fierce competition in watchmaking and on the eve of the quartz crisis, Zenith, a historic manufacturer from Le Locle, asserted its technical mastery. The 3019 PHC caliber powering this timepiece beats at 36,000 vibrations per hour, an unprecedented frequency allowing time measurement with record 1\/10th of a second precision. Its reliability and accuracy would lead Rolex to select it in the early 1980s, as part of a decade-long agreement, to power the first automatic Daytona models (ref. 16520), under the designation caliber 4030, presented in 1988.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWrist size in photo \/ video: 17cm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCase\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eGold-plated, cushion case, signed crown and cylindrical pushers\u003c\/li\u003e\n\n\u003cli\u003eDiameter 36 mm (excluding crown)\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eMineral glass \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMovement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eZenith 3019 PHC caliber, automatic with column wheel, quick date change with the crown\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eTo learn how to change the date, you can consult \u003ca href=\"https:\/\/vintagewatchspirit.com\/fr-fr\/blogs\/articles\/comment-utiliser-une-montre\" target=\"_blank\" title=\"Le fonctionnement d'une montre vintage\" rel=\"noopener\"\u003eour dedicated article here\u003c\/a\u003e.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDial\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eGilt, tone-on-tone with the three subdials (small seconds, chronograph minutes and hours)\u003c\/li\u003e\n\n\u003cli\u003eApplied gilt and black baton indexes\u003c\/li\u003e\n\n\u003cli\u003eGilt baton hands matching the dial\u003c\/li\u003e\n\n\u003cli\u003eDate window below 4 o'clock\u003c\/li\u003e\n\n\u003cli\u003eZenith star logo\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWatch serviced in July 2026\u003c\/strong\u003e\u003c\/p\u003e","brand":"Zenith","offers":[{"title":"Default Title","offer_id":53669526962523,"sku":null,"price":2702.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/7919\/9835\/files\/zenithelprimero.jpg?v=1785504429","url":"https:\/\/vintagewatchspirit.com\/en-gb\/products\/zenith-el-primero","provider":"Vintage Watch Spirit ","version":"1.0","type":"link"}