{"product_id":"buren-grand-prix-super-slender-1958","title":"1960s Buren Grand Prix Super-Slender","description":"\u003cdiv class=\"fiche-description\"\u003e\n\n\u003cp\u003eThis early 1960s Büren Grand Prix Super-Slender is equipped with the caliber 1000, which launched the brand's micro-rotor movement series. This automatic movement measures only 4.2 mm in thickness.\u003cbr\u003eThe cream dial, with very light patina, features applied indices. The case is made of stainless steel and the crown is signed.\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 except for the crystal, which has been replaced. \u003c\/span\u003eThe dial is cream-colored and has never been touched. A very slight brown spot can be observed at the top, and small dots have developed across the dial, though they are barely visible. \u003cmeta charset=\"utf-8\"\u003eThe 10-sided crown is original and signed by Buren. The case is in good overall condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cem\u003ePhoto \/ video taken on a 17 cm wrist\u003c\/em\u003e\n\u003cp\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;\"\u003eWhat is a micro-rotor?\u003c\/summary\u003e\n\u003cp\u003eIn a standard automatic movement, the oscillating weight is positioned on top of the movement. The micro-rotor is a small weight integrated within the plane of the movement, which allows for the construction of significantly thinner calibers. Hans Kocher, of Büren, filed his patent in June 1954, and Universal Genève filed theirs in 1955. \u003ca href=\"https:\/\/vintagewatchspirit.com\/blogs\/vintage-watches\/micro-rotor-ultra-thin-movement\"\u003eOur article on the micro-rotor\u003c\/a\u003e details the principle.\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 do we know about the caliber 1000?\u003c\/summary\u003e\n\u003cp\u003eThe caliber 1000 is an automatic micro-rotor movement, introduced in the late 1950s in Super Slender watches. It measures 4.2 mm in thickness and displays hours, minutes, and seconds. It was followed by the caliber 1001, which adds a date function.\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 do we know about the Büren brand?\u003c\/summary\u003e\n\u003cp\u003eThe Büren Watch Company was founded in 1873 in Büren an der Aare, Switzerland. It was acquired by the American company Hamilton in 1966, and the brand disappeared in the early 1970s.\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  }\n\u003c\/style\u003e","brand":"Buren","offers":[{"title":"Default Title","offer_id":54207514280283,"sku":null,"price":850.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/7919\/9835\/files\/BurenGrandPrixSuper-Slender1960s_main.jpg?v=1791816336","url":"https:\/\/vintagewatchspirit.com\/en\/products\/buren-grand-prix-super-slender-1958","provider":"Vintage Watch Spirit","version":"1.0","type":"link"}