{"product_id":"longines-ultra-chron-ref-7826-1-brown-yg","title":"Longines Ultra-Chron Ref. 7826-1 brown yg","description":"\u003cp\u003eLongines introduced the \u003cstrong\u003eUltra-Chron\u003c\/strong\u003e in \u003cstrong\u003e1967\u003c\/strong\u003e, at a time when mechanical precision remained one of the defining challenges of Swiss watchmaking. Rather than relying on conventional frequencies, Longines developed a family of high-beat automatic movements operating at 36,000 vibrations per hour, an impressive technical achievement for a production wristwatch of the period. The Ultra-Chron name became synonymous with this pursuit of precision, reflecting the manufacturer's ambition to bring \u003cstrong\u003ehigh-frequency chronometry\u003c\/strong\u003e to the wristwatch market.\u003c\/p\u003e\n\u003cp\u003eAt the heart of this generation was the\u003cstrong\u003e in-house calibre 431\u003c\/strong\u003e, an\u003cstrong\u003e automatic movement with central seconds and date, engineered to deliver the timekeeping performance associated with high-frequency horology. Beating at 36,000 vibrations per hour\u003c\/strong\u003e, it represented a significant technical achievement for its era. The Ultra-Chron combined this mechanical sophistication with restrained designs that ranged from everyday steel watches to more refined precious-metal executions.\u003c\/p\u003e\n\u003cp\u003eThis example, \u003cstrong\u003ereference 7826-1,\u003c\/strong\u003e presents the collection in a particularly elegant configuration. Its \u003cstrong\u003e18k gold case measures 36 mm\u003c\/strong\u003e across, offering a balanced presence while retaining the understated proportions characteristic of late-1960s dress watches. The \u003cstrong\u003eglossy brown dial is the defining visual feature: its deep, warm tone complements the gold case and creates a rich, harmonious combination that stands apart from the more frequently encountered silver and champagne dials.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInside, the automatic Longines calibre 431 operates at 36,000 vibrations per hour, while the\u003cstrong\u003e brown pigskin strap\u003c\/strong\u003e reinforces the watch's understated vintage character. The serial number, in the 50-million range, suggests a production date around 1969–1970, subject to confirmation through Longines archives.\u003cstrong\u003e This Ultra-Chron brings together an important chapter in the brand's precision-watchmaking history and an appealing combination of high-frequency engineering, precious metal and a glossy brown dial.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Longines","offers":[{"title":"Default Title","offer_id":60129942569344,"sku":null,"price":4200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/4738\/7269\/files\/970_catalogo.png?v=1792073457","url":"https:\/\/luxotimefirenze.com\/products\/longines-ultra-chron-ref-7826-1-brown-yg","provider":"Luxo Time Firenze","version":"1.0","type":"link"}