{"id":74933,"date":"2026-11-12T12:47:59","date_gmt":"2026-11-12T10:47:59","guid":{"rendered":"https:\/\/ora24.gr\/?post_type=product&p=74933"},"modified":"2026-11-12T14:51:41","modified_gmt":"2026-11-12T12:51:41","slug":"daytona-16523-el-primero-inverted-6-automatic-chronograph-rolex-service-papers","status":"publish","type":"product","link":"https:\/\/ora24.gr\/el\/product\/daytona-16523-el-primero-inverted-6-automatic-chronograph-rolex-service-papers\/","title":{"rendered":"Daytona 16523 El Primero Inverted 6 Automatic Chronograph Rolex Service Papers"},"content":{"rendered":"
\u00a0 The Rolex Cosmograph Daytona Reference 16523<\/strong> with an \"Inverted 6\" dial<\/strong> is an early production two-tone (Rolesor) automatic chronograph manufactured between 1988.<\/strong>\u00a0Powered by the modified Zenith El Primero Caliber 4030<\/strong>, this reference marks Rolex's transition from manual-wind chronographs to self-winding models while retaining collectible early dial variations.<\/pre>\n
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    Extensive Rolex Modifications.<\/strong> Built on the Zenith El Primero 400 base, Rolex reduced the beat rate from 36,000 to 28,800 vibrations per hour (4 Hz) to improve longevity and service intervals.<\/span><\/pre>\n<\/li>\n
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    Chronometer Upgrades.<\/strong> Rolex removed the date complication, replaced the regulator with a free-sprung balance using Microstella nuts, added a Breguet overcoil hairspring, and installed its bidirectional perpetual winding rotor.<\/span><\/pre>\n<\/li>\n
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    Performance & Layout.<\/strong> The COSC-certified movement features a column-wheel and lateral-clutch chronograph mechanism with roughly 52 to 54 hours of power reserve. Visually, Zenith-era Daytonas can be identified by the running seconds subdial at 9 o'clock and subdials aligned slightly below the horizontal center line.<\/span><\/pre>\n<\/li>\n
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    Two-Tone Construction.<\/strong> The 40 mm case and Oyster bracelet pair 904L stainless steel with an 18k yellow gold tachymeter bezel, screw-down pushers, Triplock crown, and solid center links. Measuring approximately 12.3 mm to 12.4 mm thick with 100 meters of water resistance, it balances sporty durability with a slim cuff-friendly profile.<\/span><\/pre>\n<\/li>\n
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    The \"Inverted 6\" Subdial.<\/strong> On early dials produced through approximately 1994, the numeral \"6\" at the bottom of the 12-hour chronograph totalizer (at 6 o'clock) is printed upside down, resembling a \"9\" when viewed upright.<\/span><\/pre>\n<\/li>\n
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    Standard Dial Colors.<\/strong> The 16523 \"Inverted 6\" was primarily offered with white, black, or champagne lacquered dials accented by yellow gold subdial rings and tritium-lumed indices (\"T Swiss Made T\").<\/span>\u00a0<\/pre>\n<\/li>\n
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    Early Mark Variations.<\/strong> Earliest examples from 1988\u20131989 (Mark I\/II) often pair the Inverted 6 with a 200-unit bezel (later updated to 400 units) and \"floating\" Cosmograph<\/em> text separated slightly from the top four lines.<\/span><\/pre>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"
    \u00a0 The Rolex Cosmograph Daytona Reference 16523 with an “Inverted 6” dial is an early production two-tone (Rolesor) automatic chronograph manufactured between 1988.\u00a0Powered by the modified Zenith El Primero Caliber 4030, this reference marks Rolex’s transition from manual-wind chronographs to self-winding models while retaining collectible early dial variations. Extensive Rolex Modifications. Built on the Zenith […]<\/p>\n","protected":false},"featured_media":74945,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[1161,4571,1158],"product_tag":[1197],"class_list":{"0":"post-74933","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-rolex","7":"product_cat-men","8":"product_cat-our-watches","9":"product_tag-homepage","10":"pa_box-papers-box-rolex-service-papers","11":"pa_bracelet-18k-yellow-gold-steel","12":"pa_brand-rolex","13":"pa_case-18k-yellow-gold-steel","14":"pa_condition-excellent","15":"pa_dial-gold","16":"pa_diameter-40mm","17":"pa_functions-chronograph","18":"pa_movement-automatic","19":"pa_reference-number-3142","20":"pa_year-2-1990s","22":"first","23":"instock","24":"shipping-taxable","25":"purchasable","26":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/product\/74933"}],"collection":[{"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/comments?post=74933"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/media\/74945"}],"wp:attachment":[{"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/media?parent=74933"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/product_cat?post=74933"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ora24.gr\/el\/wp-json\/wp\/v2\/product_tag?post=74933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}