{"id":19457,"date":"2026-02-18T15:20:08","date_gmt":"2026-02-18T14:20:08","guid":{"rendered":"https:\/\/www.lemuseonline.com\/watches-for-sale\/longines-flagship-ref-4005-1-nos\/"},"modified":"2026-02-18T15:29:57","modified_gmt":"2026-02-18T14:29:57","slug":"longines-flagship-ref-4005-1-nos","status":"publish","type":"product","link":"https:\/\/www.lemuseonline.com\/en\/watches-for-sale\/longines-flagship-ref-4005-1-nos\/","title":{"rendered":"Longines Flagship ref. 4005-1 NOS"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"<h2>Technical Details &amp; Model History<\/h2>\n<ul>\n<li><strong>Case<\/strong>: 18k white gold with extremely rare decorative finishing, typical of the most exclusive versions, 38 mm diameter<\/li>\n<li><strong>Movement<\/strong>: automatic Longines High Frequency (HF) caliber 6652<\/li>\n<li><strong>Dial<\/strong>: original blue dial with applied diamond hour markers<\/li>\n<li><strong>Crystal<\/strong>: sapphire<\/li>\n<li><strong>Strap<\/strong>: blue leather<\/li>\n<li><strong>Buckle<\/strong>: original Longines buckle<\/li>\n<li><strong>Reference<\/strong>: 4005-1<\/li>\n<li><strong>Period of production<\/strong>: 1970s<\/li>\n<li><strong>Accessories<\/strong>: original box and warranty<\/li>\n<li><strong>Condition<\/strong>: new old stock, never worn<\/li>\n<\/ul>\n<h2>Key Features<\/h2>\n<ul>\n<li><strong>HF (High Frequency)<\/strong> version, symbol of Longines\u2019 technical innovation during the 1970s<\/li>\n<li>Extremely rare 18k white gold case with intricate decorative finishing<\/li>\n<li>Original blue dial with <strong>diamond hour markers<\/strong>, a highly exclusive configuration<\/li>\n<li><strong>Never worn<\/strong> example, complete with original buckle, box and warranty<\/li>\n<\/ul>\n<h2>Historical Context<\/h2>\n<p>During the 1970s, Longines invested heavily in the development of high-frequency movements, designed to deliver greater precision and chronometric stability. The <strong>Flagship HF<\/strong> line represented the most elegant expression of this technical pursuit. Reference <strong>4005-1<\/strong>, presented here in 18k white gold with blue dial and diamond markers, is among the rarest and most refined versions produced. A never-worn example, complete with its original accessories, represents an exceptional opportunity for collectors who value originality, condition, and historical significance.<\/p>\n","protected":false},"featured_media":19435,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[786],"product_tag":[1637],"class_list":{"0":"post-19457","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-vintage-watches","7":"product_tag-longines-flagship-ref-4005-1","8":"pa_marchi-longines-en","9":"pa_movimento-automatic","11":"first","12":"instock","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Longines Flagship ref. 4005-1 NOS - Le Muse s.r.l. Orologi<\/title>\n<meta name=\"description\" content=\"Rare Longines Flagship HF ref. 4005-1 in 18k white gold with blue diamond dial, automatic high-frequency caliber 6652.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lemuseonline.com\/en\/watches-for-sale\/longines-flagship-ref-4005-1-nos\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Longines Flagship ref. 4005-1 NOS - Le Muse s.r.l. Orologi\" \/>\n<meta property=\"og:description\" content=\"Rare Longines Flagship HF ref. 4005-1 in 18k white gold with blue diamond dial, automatic high-frequency caliber 6652.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.lemuseonline.com\/en\/watches-for-sale\/longines-flagship-ref-4005-1-nos\/\" \/>\n<meta property=\"og:site_name\" content=\"Le Muse s.r.l. 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