{"product_id":"grand-seiko-sbga439g-spring-drive-midnight-blue-watch","title":"Heritage Collection Spring Drive","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\" data-end=\"500\" data-start=\"102\"\u003eThe Grand Seiko Heritage Collection SBGA439G is a masterclass in understated luxury, pairing the extraordinary precision of \u003cstrong data-end=\"242\" data-start=\"226\"\u003eSpring Drive\u003c\/strong\u003e with one of Grand Seiko's purest and most timeless designs. Featuring a captivating \u003cstrong data-end=\"356\" data-start=\"327\"\u003emidnight blue sunray dial\u003c\/strong\u003e, this elegant timepiece captures the changing hues of the night sky, shifting effortlessly from deep blue to near black depending on the light.\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"833\" data-start=\"502\"\u003ePowered by the acclaimed \u003cstrong data-end=\"556\" data-start=\"527\"\u003eSpring Drive Calibre 9R65\u003c\/strong\u003e, the SBGA439G embodies Grand Seiko's pursuit of precision, beauty and harmony with nature. Its clean, highly legible design and exceptional finishing make it a versatile companion for every occasion, from the boardroom to formal evenings. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-end=\"870\" data-start=\"835\" data-section-id=\"vwbypx\"\u003eA Dial Inspired by the Night Sky\u003c\/h2\u003e\n\u003cp data-end=\"1129\" data-start=\"872\"\u003eThe defining feature of the SBGA439G is its rich \u003cstrong data-end=\"950\" data-start=\"921\"\u003emidnight blue sunray dial\u003c\/strong\u003e. Inspired by the subtle colours of the evening sky, the dial transforms as ambient light changes, revealing a remarkable depth that is both understated and endlessly captivating.\u003c\/p\u003e\n\u003cp data-end=\"1541\" data-start=\"1131\"\u003eGrand Seiko's signature diamond-cut hands and multi-faceted indexes are finished to the brand's exacting standards, ensuring outstanding legibility while reflecting light with exceptional brilliance. A discreet power reserve indicator sits between seven and eight o'clock, balancing practicality with elegant design, while the date display at 3 o'clock completes the dial. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-end=\"1571\" data-start=\"1543\" data-section-id=\"bhj39e\"\u003eSpring Drive Calibre 9R65\u003c\/h2\u003e\n\u003cp data-end=\"1707\" data-start=\"1573\"\u003eAt the heart of the SBGA439G beats the celebrated \u003cstrong data-end=\"1664\" data-start=\"1623\"\u003eGrand Seiko Spring Drive Calibre 9R65\u003c\/strong\u003e, one of the brand's most iconic movements.\u003c\/p\u003e\n\u003cp data-end=\"1916\" data-start=\"1709\"\u003eUnlike a conventional mechanical watch, Spring Drive combines the energy of a traditional mainspring with an electronic regulator, allowing the seconds hand to glide smoothly across the dial without ticking.\u003c\/p\u003e\n\u003cp data-end=\"1938\" data-start=\"1918\"\u003eThe movement offers:\u003c\/p\u003e\n\u003cul data-end=\"2159\" data-start=\"1940\"\u003e\n\u003cli data-end=\"1975\" data-start=\"1940\" data-section-id=\"17udsk5\"\u003eApprox. \u003cstrong data-end=\"1975\" data-start=\"1950\"\u003e72-hour power reserve\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2049\" data-start=\"1976\" data-section-id=\"cxc67m\"\u003eAccuracy of \u003cstrong data-end=\"2015\" data-start=\"1990\"\u003e±15 seconds per month\u003c\/strong\u003e (approximately ±1 second per day)\u003c\/li\u003e\n\u003cli data-end=\"2075\" data-start=\"2050\" data-section-id=\"165b2tv\"\u003eSpring Drive technology\u003c\/li\u003e\n\u003cli data-end=\"2106\" data-start=\"2076\" data-section-id=\"1mdxar4\"\u003eAutomatic and manual winding\u003c\/li\u003e\n\u003cli data-end=\"2132\" data-start=\"2107\" data-section-id=\"bztqvq\"\u003ePower reserve indicator\u003c\/li\u003e\n\u003cli data-end=\"2147\" data-start=\"2133\" data-section-id=\"1fvpl6u\"\u003eDate display\u003c\/li\u003e\n\u003cli data-end=\"2159\" data-start=\"2148\" data-section-id=\"11b7kkp\"\u003e30 jewels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2306\" data-start=\"2161\"\u003eThe result is exceptional precision combined with the beauty and craftsmanship of a fully mechanical watch. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-end=\"2335\" data-start=\"2308\" data-section-id=\"3gt1u2\"\u003eTimeless Heritage Design\u003c\/h2\u003e\n\u003cp data-end=\"2624\" data-start=\"2337\"\u003eCrafted from stainless steel, the SBGA439G features Grand Seiko's classic Heritage Collection case measuring \u003cstrong data-end=\"2454\" data-start=\"2446\"\u003e40mm\u003c\/strong\u003e in diameter. The combination of mirror-finished Zaratsu polishing and fine hairline brushing creates dramatic contrasts that define Grand Seiko's unmistakable aesthetic.\u003c\/p\u003e\n\u003cp data-end=\"3016\" data-start=\"2626\"\u003eA dual-curved sapphire crystal with anti-reflective coating provides exceptional clarity, while the screw-down crown and solid screw case back contribute to \u003cstrong data-end=\"2817\" data-start=\"2783\"\u003e100 metres of water resistance\u003c\/strong\u003e, ensuring confidence in everyday wear. The stainless steel bracelet is secured with a three-fold clasp featuring a push-button release for comfort and security. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-end=\"3058\" data-start=\"3018\" data-section-id=\"17vhcuz\"\u003eThe Signature Spring Drive Experience\u003c\/h2\u003e\n\u003cp data-end=\"3376\" data-start=\"3060\"\u003eThe SBGA439G perfectly demonstrates why Spring Drive has become one of the defining achievements of modern watchmaking. Its smooth, silent seconds hand reflects the continuous flow of time, while its elegant midnight blue dial provides a subtle reminder of the natural world that inspires every Grand Seiko creation.\u003c\/p\u003e\n\u003cp data-end=\"3557\" data-start=\"3378\"\u003eWhether worn daily or reserved for special occasions, the SBGA439G offers timeless sophistication, remarkable precision and craftsmanship that will be appreciated for generations.\u003c\/p\u003e\n\u003ch2 data-end=\"3574\" data-start=\"3559\" data-section-id=\"1ma7m6t\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-end=\"4280\" data-start=\"3576\"\u003e\n\u003cli data-end=\"3597\" data-start=\"3576\" data-section-id=\"1b742lz\"\u003eReference: SBGA439G\u003c\/li\u003e\n\u003cli data-end=\"3643\" data-start=\"3598\" data-section-id=\"1i63ho6\"\u003eCollection: Grand Seiko Heritage Collection\u003c\/li\u003e\n\u003cli data-end=\"3683\" data-start=\"3644\" data-section-id=\"1q0ley2\"\u003eGrand Seiko Spring Drive Calibre 9R65\u003c\/li\u003e\n\u003cli data-end=\"3717\" data-start=\"3684\" data-section-id=\"wx80h7\"\u003eSpring Drive automatic movement\u003c\/li\u003e\n\u003cli data-end=\"3748\" data-start=\"3718\" data-section-id=\"1mdxar4\"\u003eAutomatic and manual winding\u003c\/li\u003e\n\u003cli data-end=\"3780\" data-start=\"3749\" data-section-id=\"aoaclx\"\u003eApprox. 72-hour power reserve\u003c\/li\u003e\n\u003cli data-end=\"3848\" data-start=\"3781\" data-section-id=\"vqougx\"\u003eAccuracy: ±15 seconds per month (approximately ±1 second per day)\u003c\/li\u003e\n\u003cli data-end=\"3860\" data-start=\"3849\" data-section-id=\"11b7kkp\"\u003e30 jewels\u003c\/li\u003e\n\u003cli data-end=\"3888\" data-start=\"3861\" data-section-id=\"pbwor\"\u003e40mm stainless steel case\u003c\/li\u003e\n\u003cli data-end=\"3916\" data-start=\"3889\" data-section-id=\"121btig\"\u003eMidnight blue sunray dial\u003c\/li\u003e\n\u003cli data-end=\"3942\" data-start=\"3917\" data-section-id=\"bztqvq\"\u003ePower reserve indicator\u003c\/li\u003e\n\u003cli data-end=\"3970\" data-start=\"3943\" data-section-id=\"ntcj7k\"\u003eDate display at 3 o'clock\u003c\/li\u003e\n\u003cli data-end=\"4001\" data-start=\"3971\" data-section-id=\"8ihjkc\"\u003eDual-curved sapphire crystal\u003c\/li\u003e\n\u003cli data-end=\"4044\" data-start=\"4002\" data-section-id=\"ukxftd\"\u003eAnti-reflective coating on inner surface\u003c\/li\u003e\n\u003cli data-end=\"4063\" data-start=\"4045\" data-section-id=\"6qv7r4\"\u003eScrew-down crown\u003c\/li\u003e\n\u003cli data-end=\"4081\" data-start=\"4064\" data-section-id=\"12fg8p3\"\u003eScrew case back\u003c\/li\u003e\n\u003cli data-end=\"4108\" data-start=\"4082\" data-section-id=\"wc0qzl\"\u003eStainless steel bracelet\u003c\/li\u003e\n\u003cli data-end=\"4152\" data-start=\"4109\" data-section-id=\"b85ljd\"\u003eThree-fold clasp with push-button release\u003c\/li\u003e\n\u003cli data-end=\"4193\" data-start=\"4153\" data-section-id=\"110j6kv\"\u003eWater resistant to 100 metres (10 bar)\u003c\/li\u003e\n\u003cli data-end=\"4226\" data-start=\"4194\" data-section-id=\"1s7fdrg\"\u003eMagnetic resistance: 4,800 A\/m\u003c\/li\u003e\n\u003cli data-end=\"4280\" data-start=\"4227\" data-section-id=\"rd6zor\"\u003eMade in Japan\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grand Seiko","offers":[{"title":"Default Title","offer_id":57299792101751,"sku":"SBGA439G","price":4600.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0402\/0643\/4455\/files\/SBGA439G.png?v=1784205351","url":"https:\/\/www.deacons-jewellers.com\/products\/grand-seiko-sbga439g-spring-drive-midnight-blue-watch","provider":"Deacon \u0026 Son  ","version":"1.0","type":"link"}