{"product_id":"chronographe-gruen-precision-770r","title":"Gruen Precision Chronograph 770R 1970's","description":"\u003cdiv class=\"fiche-description\"\u003e\n\n\u003cp\u003eThis Gruen Precision chronograph dates back to the 1970s. Its beautifully patinated dial pairs applied indices with two sub-dials, along with telemeter and tachymeter scales, housed in a steel case.\u003cbr\u003eIt is powered by the manual-wind Valjoux 7730 caliber, derived from the famous Venus 188 caliber, a brand absorbed by Valjoux in 1966.\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp style=\"margin-left: 8px; padding-left: 8px; border-left: 2px solid #aaa;\"\u003e\u003cstrong\u003eWatch Condition\u003c\/strong\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe watch is entirely original. The dial is in good condition and has never been touched. The case is in good condition with some signs of wear. \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cem\u003ePhoto \/ video taken on a 17 cm wrist\u003c\/em\u003e\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"fiche-faq\"\u003e\n\n\u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 10px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eWho is Gruen?\u003c\/summary\u003e\n\u003cp\u003eGruen is an American watchmaker founded in 1894 in Ohio by German-born watchmaker Dietrich Gruen. It was among the great United States watch manufacturers, alongside Hamilton, Bulova, and Elgin, and reached its peak in sales in 1953. In 1958, the company, by then known as Gruen Industries, was sold off in pieces.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 10px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eFrom the Venus 188 to the Valjoux 7730\u003c\/summary\u003e\n\u003cp\u003eWhen Valjoux absorbed Venus in 1966, it took over the Venus 188—a cam-actuated chronograph that was less expensive to manufacture than a column-wheel one—and relaunched it under the name 7730. It is a manual-winding movement with 17 jewels, beating at 18,000 vibrations per hour. The Valjoux 7750, one of the most widespread automatic chronographs, is a descendant of this movement.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 10px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-weight: 600;\"\u003eWhat are the telemeter and tachymeter used for?\u003c\/summary\u003e\n\u003cp\u003eThe tachymeter allows for the calculation of an average speed over a known distance. The telemeter estimates the distance to a phenomenon where the light is seen before the sound is heard, such as lightning or gunfire.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\u003cstyle\u003e\n  \/* Description dépliée : suivre la hauteur des accordéons *\/\n  toggle-ellipsis.is-open:has(.fiche-faq) {\n    --height: auto !important;\n    height: auto !important;\n    max-height: none !important;\n    overflow: visible !important;\n  }\n\n  toggle-ellipsis.is-open:has(.fiche-faq)\n  \u003e .toggle-ellipsis__content {\n    height: auto !important;\n    max-height: none !important;\n    overflow: visible !important;\n    clip-path: none !important;\n    -webkit-mask-image: none !important;\n    mask-image: none !important;\n  }\n\n  \/* Retirer le dégradé uniquement en mode déplié *\/\n  toggle-ellipsis.is-open:has(.fiche-faq)\n  \u003e .toggle-ellipsis__content::before,\n  toggle-ellipsis.is-open:has(.fiche-faq)\n  \u003e .toggle-ellipsis__content::after {\n    content: none !important;\n    display: none !important;\n  }\n\n  \/* FAQ : une séparation fine, sans cadre *\/\n  .fiche-faq {\n    margin: 20px 0;\n    border: 0 !important;\n    color: inherit;\n  }\n\n  .fiche-faq \u003e details {\n    position: static !important;\n    margin: 0 !important;\n    padding: 0 !important;\n    border: 0 !important;\n    border-bottom: 1px solid !important;\n    border-bottom-color:\n      color-mix(in srgb, currentColor 18%, transparent) !important;\n    background: transparent !important;\n    box-shadow: none !important;\n    height: auto !important;\n    max-height: none !important;\n    overflow: visible !important;\n  }\n\n  .fiche-faq \u003e details::before,\n  .fiche-faq \u003e details::after {\n    content: none !important;\n    display: none !important;\n  }\n\n  \/* Question et indicateur d'ouverture *\/\n  .fiche-faq \u003e details \u003e summary {\n    display: flex !important;\n    align-items: center;\n    justify-content: space-between;\n    gap: 16px;\n    position: static !important;\n    margin: 0 !important;\n    padding: 12px 0 !important;\n    border: 0 !important;\n    background: transparent !important;\n    box-shadow: none !important;\n    list-style: none !important;\n    cursor: pointer;\n    font: inherit !important;\n    font-weight: 600 !important;\n    line-height: inherit !important;\n    color: inherit !important;\n  }\n\n  .fiche-faq \u003e details \u003e summary::-webkit-details-marker {\n    display: none !important;\n  }\n\n  .fiche-faq \u003e details \u003e summary::marker {\n    content: \"\" !important;\n  }\n\n  .fiche-faq \u003e details \u003e summary::before {\n    content: none !important;\n    display: none !important;\n  }\n\n  .fiche-faq \u003e details \u003e summary::after {\n    content: \"+\" !important;\n    display: block !important;\n    position: static !important;\n    flex: 0 0 20px;\n    width: 20px !important;\n    height: auto !important;\n    margin: 0 !important;\n    padding: 0 !important;\n    border: 0 !important;\n    background: none !important;\n    transform: none !important;\n    font-family: Arial, sans-serif !important;\n    font-size: 18px !important;\n    font-weight: 400 !important;\n    line-height: 1 !important;\n    text-align: center;\n    opacity: .65;\n  }\n\n  .fiche-faq \u003e details[open] \u003e summary::after {\n    content: \"−\" !important;\n  }\n\n  .fiche-faq \u003e details \u003e summary:focus-visible {\n    outline: 2px solid currentColor;\n    outline-offset: 3px;\n  }\n\n  \/* Réponses *\/\n  .fiche-faq \u003e details:not([open]) \u003e p {\n    display: none !important;\n  }\n\n  .fiche-faq \u003e details[open] \u003e p {\n    display: block !important;\n    position: static !important;\n    height: auto !important;\n    max-height: none !important;\n    overflow: visible !important;\n    visibility: visible !important;\n    opacity: 1 !important;\n    margin: 0 !important;\n    padding: 0 0 14px !important;\n    border: 0 !important;\n    background: transparent !important;\n    box-shadow: none !important;\n    font: inherit !important;\n    line-height: inherit !important;\n    color: inherit !important;\n  }\n\n  \/* Interligne du thème pour la description *\/\n  .fiche-description p {\n    line-height: inherit !important;\n  }\u003c\/style\u003e","brand":"Gruen","offers":[{"title":"Default Title","offer_id":53669306106203,"sku":null,"price":1700.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/7919\/9835\/files\/Gruen_Precision_Chronographe_770R_1970_s.jpg?v=1792063410","url":"https:\/\/vintagewatchspirit.com\/en\/products\/chronographe-gruen-precision-770r","provider":"Vintage Watch Spirit","version":"1.0","type":"link"}