{"id":26485,"date":"2020-06-29T06:33:30","date_gmt":"2020-06-29T06:33:30","guid":{"rendered":"https:\/\/www.horbiter.com\/grand-seiko-slga001-60th-anniversary-spring-drive-9ra5\/"},"modified":"2023-11-02T06:14:32","modified_gmt":"2023-11-02T05:14:32","slug":"grand-seiko-slga001-60th-anniversary-spring-drive-9ra5","status":"publish","type":"post","link":"https:\/\/www.horbiter.com\/en\/grand-seiko-slga001-60th-anniversary-spring-drive-9ra5\/","title":{"rendered":"Grand Seiko SLGA001 60th Anniversary Spring Drive 9RA5"},"content":{"rendered":"<p style=\"text-align: justify;\">The <strong>Spring Drive<\/strong> technology has offered a third option to watch enthusiasts looking for superior timing precision along with mechanical refinement; it is perhaps the strongest answer to those who equally value quartz-timekeeping accuracy and a mechanical movement\u2019s beauty. It was <strong>1999<\/strong> when <strong>Seiko<\/strong> first introduced the <strong>Spring Drive<\/strong> technology (you may read our <a href=\"https:\/\/www.horbiter.com\/en\/seiko-spring-drive-celebrating-ten-years-of-the-most-successful-and-unique-blend-of-mechanical-and-quartz-watchmaking\/\" target=\"_self\" rel=\"noopener\"><span style=\"color: #0000ff;\"><strong>exclusive article<\/strong> <strong>here<\/strong><\/span><\/a>), and since then, <strong>Spring Drive<\/strong> movements have powered many <strong>Seiko<\/strong>, <strong>Grand Seiko<\/strong>, and <strong>Credor<\/strong> timepieces.<\/p>\n<p style=\"text-align: justify;\">Twenty-one years later, <strong>Grand Seiko<\/strong> reveals the <strong>Spring Drive<\/strong>\u2018s new-generation caliber, which marks massive improvements over the current one in terms of thickness, timing precision, maximum power reserve. As well as the new <strong>9AS5<\/strong> has paved the way to a new <strong>Hi<\/strong>\u2013<strong>Beat<\/strong> movements\u2019 generation, the same did <strong>Grand Seiko<\/strong> with the <strong>9RA5 caliber<\/strong> among <strong>Spring Drive<\/strong> movements. Also, the Japanese high-end watchmaker has opened an additional workshop in the <strong>Shizukuishi<\/strong> area to possibly bring the <strong>Grand Seiko<\/strong> production volume to its full potential.<\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" style=\"width: 100%;\" title=\"grand-seiko-60-anniversary-limited-edition-SLGA001-1\" src=\"\/media\/CACHE\/images\/uploads\/grand-seiko-60-anniversary-limited-edition-SLGA001-1.28136e64d72c.jpg\" alt=\"grand-seiko-60-anniversary-limited-edition-SLGA001-1\">The brand has selected its professional diver\u2019s watch as a flagship model to welcome the new caliber and launched a 60<sup>th<\/sup>-Anniversary limited edition timepiece known as the <strong>Grand Seiko SLGA001 60<\/strong><sup>th<\/sup> <strong>Anniversary<\/strong>. We couldn\u2019t be more surprised since we would expect <strong>Grand Seiko<\/strong> to equip the <strong>Grand Seiko SBGA229<\/strong> with this new caliber first, instead of choosing an <strong>Hi<\/strong>\u2013<strong>Beat SBGH257<\/strong> or <strong>SBGH255<\/strong>\u2018s case.<\/p>\n<h2 id=\"it-is-a-spring-drive-movement-disguised-as-an-hi-beat\">It is a Spring Drive movement, disguised as an Hi-Beat.<\/h2>\n<p style=\"text-align: justify;\">Before commenting on the new movement, let\u2019s briefly try and describe what sets the <strong>SLGA001<\/strong> apart from its <a href=\"https:\/\/www.horbiter.com\/en\/grand-seiko-hi-beat-36000-professional-divers-600m-sbgh257-sbgh255-hands-on\/\" target=\"_self\" rel=\"noopener\"><span style=\"color: #0000ff;\"><strong>Hi<\/strong>\u2013<strong>Beat<\/strong> <strong>siblings<\/strong><\/span><\/a>, aesthetically.<\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" style=\"width: 100%;\" title=\"grand-seiko-60-anniversary-limited-edition-SLGA001-2\" src=\"\/media\/CACHE\/images\/uploads\/grand-seiko-60-anniversary-limited-edition-SLGA001-2.07f411534a6c.jpg\" alt=\"grand-seiko-60-anniversary-limited-edition-SLGA001-2\">The case is <strong>46<\/strong>,<strong>9mm<\/strong> across and is <strong>16mm<\/strong> thick, shaving <strong>1mm<\/strong> off an <strong>SBGH255<\/strong>\u2018s; yet the choice of adopting <strong>Seiko<\/strong>\u2018s patented and scratch-proof <strong>High<\/strong>\u2013<strong>Intensity<\/strong> <strong>Titanium<\/strong>, cuts down its weight by approximately <strong>40<\/strong>%, making the biggest sports watch in <strong>Grand Seiko<\/strong>\u2018s offering, more comfortable.<\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" style=\"width: 100%;\" title=\"seiko-spring-drive-9RA5\" src=\"\/media\/CACHE\/images\/uploads\/seiko-spring-drive-9RA5.4ae172b1a7df.jpg\" alt=\"seiko-spring-drive-9RA5\">The rotating bezel has a black inlay (what a pity <strong>Grand Seiko<\/strong> didn\u2019t opt for a <strong>Cermet<\/strong>-crafted ring, as <strong>Seiko<\/strong> did on a recently released limited edition <strong>Seiko LX<\/strong>), the font is squared, and the dial is pale blue, a color that not solely reminds the sea-depth, but is the signature <strong>Grand Seiko<\/strong>\u2018s brand color. Finally, the power reserve indicator is divided into five parts (will explain to you why later), showcases a red\/orange hand, and is placed at 10 o\u2019clock. No mention is made in the Specs sheet about the case polishing, though I believe <strong>Grand Seiko<\/strong> has adopted the zaratsu polishing technique.<\/p>\n<h2 id=\"a-wholly-re-engineered-caliber\">A wholly re-engineered caliber.<\/h2>\n<p style=\"text-align: justify;\">The new <strong>Grand Seiko 9RA5<\/strong> caliber is the game-changer. Thinner than the outgoing one, it measures <strong>5,0mm<\/strong> instead of <strong>9R6<\/strong> caliber\u2019s <strong>5,8mm<\/strong>; the new <strong>Spring Drive<\/strong> caliber boasts, according to the brand, superior impact resistance and enhanced structural stiffness thanks to new gear-train design and layout, plus a one-piece central bridge placed on top.<\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" style=\"width: 100%;\" title=\"seiko-spring-drive-9RA5-2\" src=\"\/media\/CACHE\/images\/uploads\/seiko-spring-drive-9RA5-2.2edf4b7d0fbb.jpg\" alt=\"seiko-spring-drive-9RA5-2\"><strong>Seiko<\/strong>\u2018s <em>\u201cMagic Lever,\u201d<\/em> a patented device introduced in <strong>1959<\/strong>, geared towards efficiently recovering the energy provided by the bidirectional winding rotor, has been positioned afar from the caliber\u2019s center, and in an area where it can maximize thickness\u2019s reduction without conversely affecting the re-charging energy provided by the winding mass.<\/p>\n<h2 id=\"a-120-hour-power-reserve\">A 120-hour power reserve.<\/h2>\n<p style=\"text-align: justify;\">The new caliber totals a stunning five days (else said, <strong>120h<\/strong>) power reserve, hence a 60% increase over the <strong>Spring Drive<\/strong>\u2018s current generation. This performance sets the <strong>Grand Seiko SLGA001 60<\/strong><sup>th<\/sup> <strong>Anniversary SLGA001<\/strong> back to back with a <strong>Blancpain Fifty Fathoms<\/strong>, with the addition of the <em>\u201cGlide motion\u201d<\/em> seconds\u2019 hand\u2019s movement that no other competitor can boast.<\/p>\n<p style=\"text-align: justify;\"><strong>Grand Seiko<\/strong>\u2018s engineers achieved this performance by adopting differently sized barrels (two) to provide the right torque from maximum to minimum power reserve while optimizing parts spacing.<\/p>\n<h2 id=\"accuracy-increases-dramatically\">Accuracy increases dramatically.<\/h2>\n<p style=\"text-align: justify;\">The outgoing <strong>Grand Seiko Spring Drive<\/strong> was already a top performer, but the new caliber significantly outperforms anything else. The new <strong>Grand Seiko 9RA5<\/strong> caliber guarantees a \u00b1<strong>10 seconds per month <\/strong>accuracy thanks to a new integrated circuit too, which includes, for the first time, a temperature sensor to compensate any deviation of a quartz crystal\u2019s oscillation, given quartz crystals are affected by temperature.<\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" style=\"width: 100%;\" title=\"seiko-spring-drive-9RA5-1\" src=\"\/media\/CACHE\/images\/uploads\/seiko-spring-drive-9RA5-1.94f830855ae9.jpg\" alt=\"seiko-spring-drive-9RA5-1\"><span style=\"color: #0e101a;\">By introducing this commemorative high-end diving watch, <strong>Grand Seiko<\/strong> sets new standards among professional divers and confirms once again itself as a leading brand in luxury watchmaking. The <\/span><strong>Grand Seiko SLGA001 60<\/strong><sup>th<\/sup> <strong>Anniversary SLGA001<\/strong><span style=\"color: #0e101a;\"> will be available from <strong>August 2020<\/strong> as a limited edition of <strong>700 pieces<\/strong>, and each retailed at \u20ac<strong>11<\/strong>,<strong>500<\/strong>. <\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #0e101a;\">It will be sold inside a commemorative box that includes a blue replacement silicone strap. The retail price is high; this is by no means a flagship model, offering exceptional and unique technical prowess, but confirms how <strong>Grand Seiko<\/strong> is playing hard to position itself as a premium brand.\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\">(Photo credit: courtesy of Grand Seiko)<\/p>\n<p style=\"text-align: right;\"><a href=\"https:\/\/www.instagram.com\/falcon_crest75\/\" target=\"_blank\" rel=\"noopener\"><strong>Francesco Falcone<\/strong><\/a> @Horbiter\u00ae<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Spring Drive technology has offered a third option to watch enthusiasts looking for superior timing precision along with mechanical refinement; it is perhaps the strongest answer to those who equally value quartz-timekeeping accuracy and a mechanical movement\u2019s beauty. It was 1999 when Seiko first introduced the Spring Drive technology (you may read our exclusive [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.horbiter.com\/en\/grand-seiko-slga001-60th-anniversary-spring-drive-9ra5\/\">Read More&#8230;<span class=\"screen-reader-text\"> from Grand Seiko SLGA001 60th Anniversary Spring Drive 9RA5<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":15201,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[519,579],"tags":[],"class_list":["post-26485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grand-seiko","category-japanese-watches"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Grand Seiko SLGA001 60th Anniversary Spring Drive 9RA5<\/title>\n<meta name=\"description\" content=\"Discover the Grand Seiko SLGA001 60th Anniversary Spring Drive 9RA5 featuring a new Spring Drive caliber with enhanced precision.\" \/>\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\/grand-seiko-slga001-60th-anniversary-spring-drive-9ra5\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Grand Seiko SLGA001 60th Anniversary Spring Drive 9RA5\" \/>\n<meta property=\"og:description\" content=\"Discover the Grand Seiko SLGA001 60th Anniversary Spring Drive 9RA5 featuring a new Spring Drive caliber with enhanced precision.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.horbiter.com\/en\/grand-seiko-slga001-60th-anniversary-spring-drive-9ra5\/\" \/>\n<meta property=\"og:site_name\" content=\"Horbiter \u00e8 il magazine italiano sugli orologi di lusso. 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