{"id":40578,"date":"2020-02-08T06:00:38","date_gmt":"2020-02-08T14:00:38","guid":{"rendered":"https:\/\/www.bobswatches.com\/rolex-blog\/?p=40578"},"modified":"2024-10-22T16:08:36","modified_gmt":"2024-10-22T23:08:36","slug":"omega-speedmaster-moonwatch-1861-vs-1863","status":"publish","type":"post","link":"https:\/\/www.bobswatches.com\/rolex-blog\/omega\/omega-speedmaster-moonwatch-1861-vs-1863.html","title":{"rendered":"OMEGA Speedmaster Movements: 1861 vs. 1863"},"content":{"rendered":"\n<p>When there\u2019s almost as much discussion surrounding a particular watch movement as the watch itself, it\u2019s clear that the timepiece has reached a certain status within watch collecting circles. For example, it\u2019s not uncommon to hear caliber numbers thrown around nearly as often as reference numbers when collectors speak of the <a href=\"https:\/\/www.bobswatches.com\/omega\/moonwatch-1.html\">OMEGA Speedmaster Professional Moonwatch<\/a>. Some movements are more sought after due to their rarity while others are prized for their technical advancements. Let\u2019s take a closer took at a pair of similar OMEGA Speedmaster movements, Caliber 1861 vs. 1863, to highlight their differences and similarities.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Omega Speedmaster Moonwatch Caliber 1861 vs 1863 | Bob&#039;s Watches\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/cnMPpTWeKqU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure><\/br>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Brief History of OMEGA Speedmaster Moonwatch Movement Evolution<\/strong><\/h2>\n\n\n\n<p>As some of you may already know, the <a href=\"https:\/\/www.bobswatches.com\/omega\/speedmaster-1.html\">OMEGA Speedmaster<\/a> made its debut in 1957 as a chronograph dedicated to motorsports. Powering the chronograph was the hand-wound Lemania-based Caliber 321, which is a column-wheel controlled, lateral-clutch chronograph revered for its beautiful design. The first few generations of the Speedmaster ran on the Cal. 321 (references 2915, 2998, 105.002, 105.003, 105.012, and 145.012), including the Speedmaster watches that journeyed to the moon on Apollo 11.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter wp-image-18388 size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/10\/Omega_SpeedMaster_5D3_0928-2-Edit.jpg\" alt=\"Omega Speedmaster Professional Moonwatch Movements Cal 1861 vs Cal 1863 vs. Cal 321\" vspace=\"5\" class=\"wp-image-18388\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/10\/Omega_SpeedMaster_5D3_0928-2-Edit.jpg 1200w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/10\/Omega_SpeedMaster_5D3_0928-2-Edit-300x200.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/10\/Omega_SpeedMaster_5D3_0928-2-Edit-768x512.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/10\/Omega_SpeedMaster_5D3_0928-2-Edit-1024x683.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/10\/Omega_SpeedMaster_5D3_0928-2-Edit-570x380.jpg 570w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">The original OMEGA Speedmaster was powered by the Cal. 321 movement.<\/figcaption><\/figure>\n\n\n\n<p>However, when OMEGA introduced reference 145.022 in 1969, the Speedmaster now had another movement inside its case: the Lemania-based Caliber 861. Unlike the Cal. 321, the hand-wound Caliber 861 has a cam-controlled chronograph and was significantly easier to produce due to its simple architecture. The debut of the Speedmaster with Caliber 861 coincided with the watch\u2019s new \u201cMoonwatch\u201d nickname; however, 9t was the Caliber 321-equipped references that were actually worn on the surface of the moon.<\/p>\n\n\n\n<p>Caliber 861 (and its derivatives) continued to be the go-to movement for the standard Speedmaster Professional \u201cMoonwatch\u201d references until the introduction of ref. 3570.50 in 1996, which featured the Caliber 1861. The main difference between Caliber 861 and Caliber 1861 is that the newer movement features rhodium-plated parts instead of the previous copper-plated and un-plated parts. OMEGA still uses the Caliber 1861 and its derivatives today, and these movements are readily found in current-production Speedmaster Professional Moonwatch references.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter wp-image-40582 size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6367-Edit-copy.jpg\" alt=\"Omega Speedmaster Professional Moonwatch Movements Caliber 1861 vs Caliber 1863\" vspace=\"5\" class=\"wp-image-40582\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6367-Edit-copy.jpg 1200w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6367-Edit-copy-300x200.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6367-Edit-copy-768x512.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6367-Edit-copy-1024x683.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6367-Edit-copy-570x380.jpg 570w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">The Cal. 1861 features a Delrin chronograph brake while the Cal. 1863 features one made from metal.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Omega Caliber 1861 vs. 1863<\/strong><\/h2>\n\n\n\n<p>The OMEGA Caliber 1861 is a hand-wound chronograph movement that operates at a frequency of 21,600 beats per hour (3Hz) and provides a power reserve of 48 hours when fully wound. It has 18 jewels and its parts are rhodium-plated. OMEGA has been using this movement in select Speedmaster watches since 1996; however, it is not found in any other current-production OMEGA watches. Modern Speedmaster Professional Moonwatch references that house Caliber 1861 include the Speedmaster ref. 311.30.42.30.01.005 and the Speedmaster 311.33.42.30.01.001. There are other modern Speedmasters that also run on the Cal. 1861; however, these do not fall within the parameters of what an OMEGA enthusiast would consider &#8216;true descendants&#8217; of the 42mm stainless steel Moonwatch.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter wp-image-40579 size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"489\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Screen-Shot-2020-02-05-at-2.55.41-PM.jpg\" alt=\"Omega Speedmaster Professional Moonwatch Movements Caliber 1861 vs Caliber 1863\" vspace=\"5\" class=\"wp-image-40579\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Screen-Shot-2020-02-05-at-2.55.41-PM.jpg 1200w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Screen-Shot-2020-02-05-at-2.55.41-PM-300x122.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Screen-Shot-2020-02-05-at-2.55.41-PM-768x313.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Screen-Shot-2020-02-05-at-2.55.41-PM-1024x417.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Screen-Shot-2020-02-05-at-2.55.41-PM-585x238.jpg 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Can you spot the differences between the Cal. 1861 and the Cal. 1863?<\/figcaption><\/figure>\n\n\n\n<p>Caliber 1863 is based on the Caliber 1861 with identical performance, but it is the movement reserved for models with transparent casebacks. Therefore, because Cal. 1863 is on display while Cal. 1861 is hidden behind a solid caseback, Caliber 1863 is the more attractive version, featuring circular graining on the baseplate, bridges with Geneva stripes (also known as the C\u00f4tes de Gen\u00e8ve, and polished edges on levers and bridges. Additionally, the Caliber 1863 is equipped with a metal chronograph brake while the Caliber 1861 is fitted with a Delrin (a plastic polymer material) chronograph brake. Current-production Speedmaster Professional Moonwatch references that run on the Caliber 1863 include Speedmaster ref. 311.30.42.30.01.006 and Speedmaster ref. 311.33.42.30.01.002.<\/p>\n\n\n\n<p>In short, while they perform identically, Caliber 1863 is the luxurious version of Caliber 1861, decorated to be more aesthetically pleasing since it is the movement destined for Speedmasters with display casebacks.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter wp-image-40580 size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6365-Edit-copy.jpg\" alt=\"Omega Speedmaster Moonwatch Movement Caliber 1861 versus Caliber 1863\" vspace=\"5\" class=\"wp-image-40580\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6365-Edit-copy.jpg 1200w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6365-Edit-copy-300x200.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6365-Edit-copy-768x512.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6365-Edit-copy-1024x683.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2020\/02\/Omega_Speedmaster_movement-5D3_6365-Edit-copy-570x380.jpg 570w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">The Caliber 1863 features more ornately decorated components.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Choosing Between Caliber 1861 and 1863: Which is Right for You?<\/h2>\n\n\n\n<p>Ultimately, whether you choose the OMEGA Speedmaster with the Caliber 1861 or the Caliber 1863 depends on your priorities as a collector or enthusiast. The Cal. 1861 offers the traditional appeal and durability of a Moonwatch with a solid caseback, while the Cal. 1863 caters to those seeking a more visually striking movement visible through a display caseback. Both provide excellent chronograph performance, keeping the legacy of the Speedmaster alive.<\/p>\n\n\n\n<p>For those who prefer a timepiece that stays true to the original Moonwatch design, the Caliber 1861 is an ideal choice. It embraces the functional, historical elements of the Speedmaster, keeping it simple and iconic. On the other hand, the Caliber 1863\u2019s aesthetic enhancements make it a more attractive option for collectors who enjoy showcasing the inner workings of their watch without sacrificing performance.<\/p>\n\n\n\n<p>In the end, both movements carry the prestige and history of the OMEGA Speedmaster Moonwatch, ensuring you can&#8217;t go wrong with either option. The decision comes down to personal taste\u2014whether you value the classic look or appreciate a more refined, decorative movement\u2014either way, you own a piece of horological history.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter wp-image-35720 size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1333\" height=\"937\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/07\/Omega_SpeedMaster_5D3_0377-Edit-1.jpg\" alt=\"Omega Speedmaster Professional Moonwatch Cal 1861 vs Cal 1863 Comparison Guide\" vspace=\"5\" class=\"wp-image-35720\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/07\/Omega_SpeedMaster_5D3_0377-Edit-1.jpg 1333w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/07\/Omega_SpeedMaster_5D3_0377-Edit-1-300x211.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/07\/Omega_SpeedMaster_5D3_0377-Edit-1-768x540.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/07\/Omega_SpeedMaster_5D3_0377-Edit-1-1024x720.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/07\/Omega_SpeedMaster_5D3_0377-Edit-1-541x380.jpg 541w\" sizes=\"(max-width: 1333px) 100vw, 1333px\" \/><figcaption class=\"wp-element-caption\">Which Omega Speedmaster Moonwatch Movement do you prefer?<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>When there\u2019s almost as much discussion surrounding a particular watch movement as the watch itself, it\u2019s clear that the timepiece [&hellip;]<\/p>\n","protected":false},"author":80,"featured_media":40580,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ep_exclude_from_search":false,"footnotes":""},"categories":[2362],"tags":[],"ppma_author":[2307],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>OMEGA Speedmaster Movements 1861 vs 1863: Key Differences<\/title>\n<meta name=\"description\" content=\"The Omega Speedmaster Professional Moonwatch is available with two different movements. 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