{"id":64420,"date":"2026-06-20T09:11:11","date_gmt":"2026-06-20T07:11:11","guid":{"rendered":"https:\/\/www.horbiter.com\/?p=64420"},"modified":"2026-06-20T09:14:04","modified_gmt":"2026-06-20T07:14:04","slug":"the-roger-dubuis-excalibur-biretrograde-perpetual-calendar","status":"publish","type":"post","link":"https:\/\/www.horbiter.com\/en\/the-roger-dubuis-excalibur-biretrograde-perpetual-calendar\/","title":{"rendered":"The Roger Dubuis Excalibur Biretrograde Perpetual Calendar"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"intro\">Intro<\/h2>\n\n\n\n<p>By launching the Excalibur Biretrograde Calendar on the brand\u2019s 30th anniversary, Roger Dubuis didn\u2019t just celebrate a milestone; it also shared with the watch community the direction it has taken, as we discussed in our opening article about the <strong>2026 releases<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2025\/07\/roger-dubuis-excalibur-biretrograde-calendar-3.jpg\" alt=\"roger dubuis excalibur biretrograde calendar 3\"><\/figure><\/div>\n\n\n<p>The time has come for the next-gen Roger Dubuis, and the new era\u2019s most complicated Excalibur to date (if we exclude the Excalibur Grande Complication): the <strong>Biretrograde Perpetual Calendar<\/strong>.<\/p>\n\n\n\n<p>Get used to it; the retrograde day-date display isn\u2019t a fancy detail; it embodies a renewed product philosophy and grounds the most prestigious Excalibur, combining <strong>old-school watchmaking<\/strong> with exclusive materials and finishes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"richly-detailed-meticulously-crafted\">Richly detailed, meticulously crafted<\/h2>\n\n\n\n<p>When a timepiece carries the <strong>Hallmark of Geneva<\/strong>, rest assured you made a high-end specs-based timepiece yours, down to the tiniest, invisible detail.<\/p>\n\n\n\n<p>Still, that cannot make <strong>an excellent watch feel superb<\/strong>, and that\u2019s where Roger Dubuis added its formula to make it stand out.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 2\" class=\"wp-image-63565\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure><\/div>\n\n\n<p>An Excalibur Biretrograde Perpetual Calendar sums up an expertise that places <strong>decoration and materials<\/strong> in the first row, out of a seven-layer skeletonised dial, where extensive use of mother-of-pearl, aventurine quartz, and rose gold applications come together to enrich the execution.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"aventurine-quartz\">Aventurine Quartz<\/h3>\n\n\n\n<p>For your records, aventurine quartz appears exclusively as a <strong>starry skyline base<\/strong>, with a laser-engraved rose-gold domed moon on top.<\/p>\n\n\n\n<p>Mother-of-pearl is executed in the brand\u2019s signature <em>\u201cAstral Blue,\u201d<\/em> and is everywhere, from the <strong>elliptical counters<\/strong> to the outermost flange, whereas the main plate combines satin-finish and PVD-treatment instead (same as for the tiny leap year disc).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 3\" class=\"wp-image-63567\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure><\/div>\n\n\n<p>The designers\u2019 effort aimed to further decode the <strong>multiple pieces<\/strong> of information on display, despite the darker tones chosen.<\/p>\n\n\n\n<p>Topping it all off with a rose gold case, the outcome is the <strong>richest Excalibur ever<\/strong>, miles apart from the sportier executions and much classier than ever before. It works and conveys exclusivity in a classic <strong>haute horlogerie silhouette<\/strong>, and in a quintessential Excalibur baroque style.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 4\" class=\"wp-image-63569\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure><\/div>\n\n\n<p>At 40.00 mm in diameter and 12.25 mm thick, this compact perpetual calendar watch is <strong>water-resistant to 100 meters<\/strong>, making the most of a sporty yet luxurious case.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"a-traditional-design-approach\">A traditional design approach<\/h3>\n\n\n\n<p>Aside from the visible gearing to make the <strong>retrograde non-linear display<\/strong> of day and date work, the RD850 calibre follows a traditional design approach; its execution complies with the Hallmark of Geneva specification, as said, while a handy 60-hour power reserve guarantees everyday functionality.<\/p>\n\n\n\n<p>Also, it provides a precise moon phase for <strong>approximately 122 years<\/strong> before requiring its first adjustment, and comes equipped with a silicon escapement that uniquely pairs a perpetual calendar with a retrograde day-date display.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"final-thoughts\">Final Thoughts<\/h2>\n\n\n\n<p>The Excalibur Biretrograde Perpetual Calendar retails at an on-request listed price, with a total of <strong>188 pieces<\/strong> produced.<\/p>\n\n\n\n<p>What excites me most is how the watch fits within its specific market. While style and proportions are, and always will be, subjective, <strong>the execution is remarkable<\/strong> and continues to strengthen the RD\u2019s foothold as a disruptive watch brand\u2014not everybody\u2019s cup of tea, by any means.<\/p>\n\n\n\n<p>Any collector placing an order for this Excalibur is <strong>rarely anybody<\/strong> looking for a Jaeger-LeCoultre Perpetual Calendar or a Vacheron Patrimony housing the same complication.<\/p>\n\n\n\n<p>Even in such a rooted execution, an Excalibur Biretrograde Perpetual Calendar <strong>belongs to a class of its own<\/strong>, which is why it won\u2019t fit into any mainstream product portfolio, despite paying visual and technical homage to enduring classicism.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 1\" class=\"wp-image-63563\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure><\/div>\n\n\n<p>I believe Roger Dubuis has targeted those who were once done with classic-looking wristwatches, while capturing a younger yet high-spending audience <strong>who equally value<\/strong> traditional execution and daring attire.<\/p>\n\n\n\n<p>And that\u2019s where Roger Dubuis\u2019s approach to watchmaking comes <strong>closer to Indie watchmaking<\/strong> than its peers within the same luxury group.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new.jpg\" data-pswp-width=\"900\" data-pswp-height=\"600\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" data-id=\"63572\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new\" class=\"wp-image-63572\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4.jpg\" data-pswp-width=\"900\" data-pswp-height=\"600\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" data-id=\"63570\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 4\" class=\"wp-image-63570\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-4-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3.jpg\" data-pswp-width=\"900\" data-pswp-height=\"600\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" data-id=\"63568\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 3\" class=\"wp-image-63568\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-3-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2.jpg\" data-pswp-width=\"900\" data-pswp-height=\"600\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" data-id=\"63566\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 2\" class=\"wp-image-63566\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-2-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1.jpg\" data-pswp-width=\"900\" data-pswp-height=\"600\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"600\" data-id=\"63564\" src=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1.jpg\" alt=\"Roger Dubuis Excalibur Biretrograde Perpetual Calendar new 1\" class=\"wp-image-63564\" srcset=\"https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1.jpg 900w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-300x200.jpg 300w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-480x320.jpg 480w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-600x400.jpg 600w, https:\/\/www.horbiter.com\/wp-content\/uploads\/2026\/04\/Roger-Dubuis-Excalibur-Biretrograde-Perpetual-Calendar-new-1-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<p>(Photo credit: Horbiter\u00ae)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Intro By launching the Excalibur Biretrograde Calendar on the brand\u2019s 30th anniversary, Roger Dubuis didn\u2019t just celebrate a milestone; it also shared with the watch community the direction it has taken, as we discussed in our opening article about the 2026 releases. The time has come for the next-gen Roger Dubuis, and the new era\u2019s [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.horbiter.com\/en\/the-roger-dubuis-excalibur-biretrograde-perpetual-calendar\/\">Read More&#8230;<span class=\"screen-reader-text\"> from The Roger Dubuis Excalibur Biretrograde Perpetual Calendar<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":64396,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[553,571],"tags":[],"class_list":["post-64420","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-roger-dubuis","category-watch-reviews"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The Roger Dubuis Excalibur Biretrograde Perpetual Calendar<\/title>\n<meta name=\"description\" content=\"Discover the Roger Dubuis Excalibur Biretrograde Perpetual Calendar in our detailed hands-on review with pictures and specifications.\" \/>\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.horbiter.com\/en\/the-roger-dubuis-excalibur-biretrograde-perpetual-calendar\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Roger Dubuis Excalibur Biretrograde Perpetual Calendar\" \/>\n<meta property=\"og:description\" content=\"Discover the Roger Dubuis Excalibur Biretrograde Perpetual Calendar in our detailed hands-on review with pictures and specifications.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.horbiter.com\/en\/the-roger-dubuis-excalibur-biretrograde-perpetual-calendar\/\" \/>\n<meta property=\"og:site_name\" content=\"Horbiter \u00e8 il magazine italiano sugli orologi di lusso. 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