{"id":15463,"date":"2019-02-20T17:30:33","date_gmt":"2019-02-20T17:30:33","guid":{"rendered":"https:\/\/www.firstclasswatches.co.uk\/blog\/?p=15463"},"modified":"2019-02-20T15:19:38","modified_gmt":"2019-02-20T15:19:38","slug":"sinn-903","status":"publish","type":"post","link":"https:\/\/www.firstclasswatches.co.uk\/blog\/2019\/02\/sinn-903\/","title":{"rendered":"The Sinn 903 Navigation Chronograph"},"content":{"rendered":"<p>&nbsp;<\/p>\n<h3><strong>The Sinn 903 St B E Navigation Chronograph<\/strong><\/h3>\n<p>The birth of the<a href=\"https:\/\/www.firstclasswatches.co.uk\/sinn-903-st-b-e-nav-chrono-dark-brown-alligator-embossed-leather-903045-brown-leather-p-42169\/\"> Sinn 903<\/a> is actually quite an interesting one. During the quartz crisis in the late 1970&#8217;s, Mr Helmut Sinn, the founder of <a href=\"https:\/\/www.sinn.de\/de\/\">Sinn watches<\/a> was able to secure the rights, at an undisclosed price, from <a href=\"https:\/\/www.breitling.com\/gb-en\/?gclid=EAIaIQobChMI4vu11qbK4AIVKL7tCh2hdQpQEAAYASAAEgI37_D_BwE&amp;gclsrc=aw.ds\">Breitling<\/a> to be able to produce a timepiece with a slide rule, logarithmic bezel that also functions as a chronograph too! This is why you may see some quite obvious similarities between the Sinn 903 St and the <a href=\"https:\/\/www.breitling.com\/gb-en\/watches\/navitimer-1\/b01-chronograph-46\/AB0127211B1P1\/\">Breitling Navitimer<\/a>!<\/p>\n<p>The 903 St has been consistently updated through the years, and now the latest version is here, and has a lot to appreciate. In addition to the fascinating variety of different features that this model holds, the\u00a0903 St BE\u00a0Navigation Chronograph has been characterized by the feature-rich, deep blue dial, with hands and indexes that have been coloured with an ivory imitation tone. Any watch enthusiast will be able to appreciate the attention to detail and the the convincing clarity in the assignment of functions.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-15466\" src=\"https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903.jpg\" alt=\"sinn 903\" width=\"838\" height=\"319\" srcset=\"https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903.jpg 838w, https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903-300x114.jpg 300w, https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903-768x292.jpg 768w, https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903-750x286.jpg 750w, https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903-510x194.jpg 510w, https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903-360x137.jpg 360w, https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/sinn-903-120x46.jpg 120w\" sizes=\"(max-width: 838px) 100vw, 838px\" \/><\/p>\n<p>A chronograph targeted at those interested in analog calculations, with a classic slide rule. In order to perform the mathematical operations on the\u00a0Sinn 903, there is a second crown at the 10 o&#8217;clock position. This is used for the slide rule turning ring where the logarithmic scale graduation is served.<\/p>\n<blockquote>\n<h5>With its help, for example, multiplication, division and rule of three can be performed as well as other useful calculations such as fuel consumption or speed, distance and time.\u00a0In addition, this watch has a chronograph function, with which time periods can be measured and recorded.<\/h5>\n<\/blockquote>\n<h4><strong>Mechanical Specifications<\/strong><\/h4>\n<ul>\n<li>SW 500<\/li>\n<li>self-winding<\/li>\n<li>25 ruby \u200b\u200bbearing stones<\/li>\n<li>28,800 vibrations per hour<\/li>\n<li><a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_90\">stop second<\/a><\/li>\n<li><a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_77\">Antimagnetic<\/a>\u00a0according to DIN 8309<\/li>\n<\/ul>\n<h4><strong>Case Dimensions<\/strong><\/h4>\n<ul>\n<li>Housing made of\u00a0<a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_13\">stainless steel<\/a>\u00a0, polished \/ satin<\/li>\n<li>Cover glass made of\u00a0<a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_39\">sapphire crystal<\/a>\u00a0,\u00a0<a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_15\">anti-reflective\u00a0<\/a><a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_39\">coating<\/a>\u00a0on both sides<\/li>\n<li>Display back made of\u00a0<a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_39\">sapphire crystal glass<\/a>\u00a0, with\u00a0<a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_15\">anti-reflective\u00a0<\/a><a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_39\">coating on the<\/a>\u00a0inside<\/li>\n<li>Bolted floor<\/li>\n<li>Winding crown screwed<\/li>\n<li>Meets the technical requirements of DIN 8310 for\u00a0<a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_70\">waterproofness<\/a><\/li>\n<li><a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_12\">Pressure-resistant<\/a>\u00a0up to 10\u00a0<a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_7\">bar<\/a><\/li>\n<li><a class=\"Stichwort\" href=\"https:\/\/www.sinn.de\/de\/Technik-ABC.htm#technikabc_65\">Low pressure resistant<\/a><\/li>\n<\/ul>\n<h4><strong>Measurements and Weight<\/strong><\/h4>\n<ul>\n<li>Case diameter: 41.0 mm<\/li>\n<li>Strap width: 22 mm<\/li>\n<li>Total height in the middle of the clock: 14.5 mm<\/li>\n<li>Weight without band: 88 grams<\/li>\n<\/ul>\n<p>Another fantastic timepiece from the Sinn range is the 104 collection, a classic pilots watch that is available in a number of different colours and strap combinations, check it out <a href=\"https:\/\/www.firstclasswatches.co.uk\/blog\/2019\/02\/sinn-104\/\">here<\/a>!<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>&nbsp; The Sinn 903 St B E Navigation Chronograph The birth of the Sinn 903 is actually quite an interesting one. During the quartz crisis in the late 1970&#8217;s, Mr&hellip;<\/p>\n","protected":false},"author":19,"featured_media":15464,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[11],"tags":[5861,14,1550,6495,1551],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.4.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The Sinn 903 Navigation Chronograph - First Class Watches Blog<\/title>\n<meta name=\"description\" content=\"The Sinn 903 St B E Navigation Chronograph is one of the best looking luxury slide rule chronograph timepieces on the market;\" \/>\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.firstclasswatches.co.uk\/blog\/2019\/02\/sinn-903\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Sinn 903 Navigation Chronograph - First Class Watches Blog\" \/>\n<meta property=\"og:description\" content=\"The Sinn 903 St B E Navigation Chronograph is one of the best looking luxury slide rule chronograph timepieces on the market;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.firstclasswatches.co.uk\/blog\/2019\/02\/sinn-903\/\" \/>\n<meta property=\"og:site_name\" content=\"First Class Watches Blog\" \/>\n<meta property=\"article:published_time\" content=\"2019-02-20T17:30:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-02-20T15:19:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.firstclasswatches.co.uk\/blog\/wp-content\/uploads\/2019\/02\/product42169-3-1856_cropped-15.jpg.thumb_1129x1600-15.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"737\" \/>\n\t<meta property=\"og:image:height\" content=\"1044\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Danny Choudhury\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.firstclasswatches.co.uk\/blog\/#website\",\"url\":\"https:\/\/www.firstclasswatches.co.uk\/blog\/\",\"name\":\"First Class Watches Blog\",\"description\":\"All the Guides, News &amp; 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