{"product_id":"a-vintage-longines-ultra-chron-8309-watch-cal-6651-cross-hair-dial-1970s","title":"A Vintage Longines ULTRA-CHRON 8309 watch Cal 6651 cross hair dial 1970s","description":"\u003ch4\u003e\u003cstrong\u003eSPECIFICATION\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eReference : \u003c\/strong\u003eLongines ULTRA-CHRON 8309\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003eMovement : \u003c\/strong\u003eCal, 6651 25 jewel 28,800 bph\u003cbr\u003e\u003cstrong\u003eAge : \u003c\/strong\u003eCirca 70s\u003cbr\u003e\u003cstrong\u003eCase Size :\u003c\/strong\u003e 35mm\u003cbr\u003e\u003cstrong\u003eCase Thickness : \u003c\/strong\u003e10mm\u003cbr\u003e\u003cstrong\u003eLug to Lug : \u003c\/strong\u003e40mm\u003cbr\u003e\u003cstrong\u003eLugs : \u003c\/strong\u003e18mm\u003cbr\u003e\u003cstrong\u003eCondition :\u003c\/strong\u003e Used Longines watch\u003cbr\u003e\u003cstrong\u003eBox \u0026amp; Papers :\u003c\/strong\u003e No\u003cbr\u003e\u003cstrong\u003eCase Material :\u003c\/strong\u003e Stainless Steel\u003cbr\u003e\u003cstrong\u003eWarranty :\u003c\/strong\u003e 12-Months Warranty\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003ePOINTS TO MENTION\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIn fantastic preowned condition with light wear\u003c\/li\u003e\n\u003cli\u003eCase and bezel have some light marks and scratches\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSunburst Cross Hair Dial\u003c\/li\u003e\n\u003cli\u003eFully serviced high Beat 28,800 bph movement\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLongines signed Crown\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePaired with an unworn black leather strap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eA BIT OF TRIVA\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Longines Ultra-Chron, introduced in 1966 to commemorate the company’s 100th anniversary, was one of the world’s most accurate watches at the time,  It was a pioneer in high-frequency mechanical watchmaking, with a Caliber 6651 movement oscillating at 28.8000 vibrations per hour (vph). This made it far more accurate than typical movements of the era, which generally operated at 18,000 or 21,600 vph. The Ultra-Chron’s high-frequency movement, part of Longines’ push toward innovation, was designed to be more resistant to shocks, making it an excellent choice for high-performance sports and professional use.\u003c\/p\u003e\n\u003cp\u003eThe Ultra-Chron gained popularity in the 1960s and 1970s for its precise timekeeping under extreme conditions, cementing Longines’ reputation for quality and high-performance timepieces. Housed in durable stainless steel cases, the Ultra-Chron featured various dial and case designs, including the distinctive thick lugs and cushion-style cases. Despite being produced only until the mid-1970s, the Ultra-Chron remains a significant part of Longines' legacy. It is remembered as one of the first high-frequency mechanical watches and a key contributor to the development of modern horology, particularly in the context of professional-grade timekeeping. Today, the Longines Ultra-Chron 8309 is a sought-after vintage piece, prized by collectors for its innovation, precision, and timeless appeal.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eOUR THOUGHTS\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Longines Ultra-Chron may not have the headline fame of some vintage icons, but make no mistake, it’s a hidden gem that deserves the spotlight. Powered by a high-frequency movement, the Ultra-Chron is the quiet overachiever of the watch world: \u003cspan\u003eThe long and rich history of LONGINES is written into each of the brand’s design. Each piece produced over the years is part of the Swiss watchmaker identity, a historical legacy that LONGINES has always strived to preserve and highlight.\u003c\/span\u003e\u003c\/p\u003e","brand":"Past2PresentWatches","offers":[{"title":"Default Title","offer_id":62447678980483,"sku":"LUC3140WO","price":795.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/2397\/4423\/files\/Longines-UltraChron-8309-front-angled.jpg?v=1787914512","url":"https:\/\/past2presentwatches.com\/products\/a-vintage-longines-ultra-chron-8309-watch-cal-6651-cross-hair-dial-1970s","provider":"Past2PresentWatches","version":"1.0","type":"link"}