{"product_id":"seiko-spring-drive-tuna-as09120","title":"Seiko Spring Drive Tuna","description":"\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eIt started with a letter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eIn 1968, a disgruntled professional diver in Hiroshima wrote to Seiko to complain that the dive watch he had been using simply was not robust enough. When exposed to prolonged pressure at depth, the watch filled with helium, he wrote. The crystal would pop off, rendering a vital piece of equipment useless. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eSeven years and 20 patents later, the first Seiko Tuna emerged... \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe first Tuna, Reference 6159-7010, was released in 1975 after seven years of development, but Seiko didn't stop there. In the late 1960s and early 1970s, Seiko was considered the masters of the Quartz technology — after all, they had been the first to implement a Quartz movement in a commercially-available wristwatch. By 1978, Seiko incorporated the technology into the Tuna line. Though contemporary collectors may look down upon quartz technology, we must remember that it represented the pinnacle of horological achievement at the time, guaranteeing unprecedented accuracy. Furthermore, since it was more or less still in its infancy (at least in wristwatches), it was considered a luxury. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThe first quartz Tuna, Reference 7549-7000 (released in 1978), is often referred to as the ‘Golden Tuna’ by collectors due to the golden hue of the nitride coating on its titanium case. At 49mm the Golden Tuna may be smaller than its 51mm predecessor, but 49mm is large even by today's standards. So Seiko followed the Golden Tuna with the youngest of the series, the Reference 7459-7010, which collectors have given the nickname ‘Baby Tuna’.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eThis particular Seiko Tuna is a Reference SBDB009 represents the apex of four decades of dive watch making. And yes, this one also has a nickname –  the ‘Spring Drive Tuna’. Its 50mm DLC coated titanium case features the signature outer shroud casing, a fully graduated unidirectional elapsed time bezel and a signed screw-down crown. Its matte black luminous dial features a set of highly legible printed indices, a recessed center with power reserve indicator and a matching ‘broad arrow’ handset. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003eAs its nickname denotes, this Seiko Tuna houses the brand's Calibre 5R65 Spring Drive movement offering a lengthy 72-hour power reserve, crazy-good accuracy (technical term!) and a silky-smooth seconds hand sweep. \u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"font-weight: 400;\"\u003eNothing looks better with jeans and a t-shirt during the summer time than a \u003c\/span\u003e\u003ci\u003e\u003cspan style=\"font-weight: 400;\"\u003ebig \u003c\/span\u003e\u003c\/i\u003e\u003cspan style=\"font-weight: 400;\"\u003edive watch. There’s no doubt that this Seiko Tuna fits that bill with aplomb and is sure to be a catch if you decide to snag this one! \u003c\/span\u003e","brand":"Seiko","offers":[{"title":"Default Title","offer_id":40375236296791,"sku":"40991686","price":3900.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/1255\/files\/AS09120_40991686_SEIKO__TUNA_SPRINGDRIVE_SBDB009.jpg?v=1701203052","url":"https:\/\/www.analogshift.com\/products\/seiko-spring-drive-tuna-as09120","provider":"Analog:Shift","version":"1.0","type":"link"}