{"product_id":"seiko-prospex-spb501-padi-divers-watch","title":"Seiko Prospex SPB501J1 1965 PADI Diver's Watch | Green Dial | Cal. 6R55 | 300m","description":"\u003cdiv class=\"spw-body\"\u003e\n\n\u003csection class=\"spw-intro\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eSeiko SPB501\u003c\/strong\u003e is a genuine \u003cstrong\u003eSeiko Prospex\u003c\/strong\u003e timepiece built around the in-house \u003cstrong\u003eCalibre 6R55\u003c\/strong\u003e (case reference 6R55-00C0). A limited edition of only PADI Special Edition (recurring but limited batches) pieces, Inspired by 1965 Seiko 62MAS, it represents Seiko's commitment to quality, accuracy and value at its price point.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"spw-specs-highlight\"\u003e\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSPB501, SPB501J1\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Number\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e6R55-00C0\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMovement\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eCalibre 6R55\u003c\/strong\u003e — Automatic (self-winding + hand-wind)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Reserve\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eApprox. 72 hours\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBeat Rate\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e21,600 bph\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJewels\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e24\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e−15\/+25 sec\/day\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Diameter\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e40.0 mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Thickness\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e13.0 mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLug Width\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e20 mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Material\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eStainless Steel with Super-Hard Coating\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSapphire crystal (curved \/ domed)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnti-Reflective\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes — inner surface AR coating\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial Colour\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eGreen\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e300 m \/ 30 ATM \/ 30 bar\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eISO 6425 Certified\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes — ISO 6425 diver's watch certified (uni-dir. bezel, legibility, shock, strap security tests)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracelet \/ Strap\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eStainless steel bracelet + PADI NATO strap\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClasp\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eThree-fold clasp with double lock, push-buttons and diver's extension\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e174 g\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLume\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eLumiBrite; green glow; applied to all hour markers, hands and bezel pip\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eJapan\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e3 years\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"spw-movement\"\u003e\n\u003ch2\u003eCalibre 6R55 — In-House Automatic Movement\u003c\/h2\u003e\n\u003cp\u003eCalibre 6R55 is produced entirely in-house at Seiko's Shizukuishi or SII facility in Japan. It offers a power reserve of approximately Approx. 72 hours, beating at 21,600 bph with 24 jewels. The bidirectional Magic Lever rotor system ensures efficient automatic winding in both directions of rotation. Seconds hand stop (hacking) allows precise time setting to the second.\u003c\/p\u003e\n\u003cp\u003eFunctions delivered by Calibre 6R55: \u003cstrong\u003eHours, Minutes, Seconds, Date, GMT 24-hour hand\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"spw-case\"\u003e\n\u003ch2\u003eCase, Crystal \u0026amp; Finishing\u003c\/h2\u003e\n\u003cp\u003eThe 40.0 mm case is constructed from \u003cstrong\u003eStainless Steel with Super-Hard Coating\u003c\/strong\u003e with a brushed + polished (mixed) finish. The solid screw-down caseback ensures water resistance integrity. The sapphire crystal (curved \/ domed) sits above the dial, with double-sided anti-reflective coating for optimal clarity in all lighting conditions.\u003c\/p\u003e\n\u003cp\u003eThe uni-directional rotating bezel is a critical safety feature: it can only be turned counter-clockwise, ensuring that any accidental rotation reduces — never extends — the indicated dive time. The 60-minute graduated scale is clearly marked for elapsed-time measurement. The screw-down provides a secure seal against water ingress.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"spw-dial\"\u003e\n\u003ch2\u003eDial \u0026amp; Legibility\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSunray brushed green lacquered metal with wave-effect gradient\u003c\/strong\u003e features applied baton hour markers, oversized for legibility, with lumibrite. LumiBrite — Seiko's proprietary strontium aluminate photoluminescent compound — is applied to the hands and hour markers, providing a reliable green glow in low-light and darkness without any radioactive materials. The date display at 4:30 position is set via the crown.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"spw-bracelet\"\u003e\n\u003ch2\u003eBracelet, Strap \u0026amp; Clasp\u003c\/h2\u003e\n\u003cp\u003eSupplied on a \u003cstrong\u003eStainless steel bracelet + PADI NATO strap\u003c\/strong\u003e with lug width of \u003cstrong\u003e20 mm\u003c\/strong\u003e. The \u003cstrong\u003ethree-fold clasp with double lock, push-buttons and diver's extension\u003c\/strong\u003e provides secure fastening with a diver's extension for use over a wetsuit. Aftermarket strap options are available for the 20 mm lug width.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"spw-water\"\u003e\n\u003ch2\u003eWater Resistance \u0026amp; Durability\u003c\/h2\u003e\n\u003cp\u003eRated to \u003cstrong\u003e300 m \/ 30 ATM \/ 30 bar\u003c\/strong\u003e and ISO 6425 diver's watch certified. This means the watch is designed and tested for professional scuba diving use. ISO 6425 certification requires the watch to pass over 15 individual tests including water pressure, condensation resistance, strap security, legibility, shock resistance, magnetic resistance and the requirements of a uni-directional bezel. The seiko diashock system absorbs mechanical shocks to the movement.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"spw-gmt\"\u003e\u003ch2\u003eGMT \u0026amp; World Time Function\u003c\/h2\u003e\n\u003cp\u003eThe GMT complication uses a caller-type architecture: the local hour hand adjusts independently in one-hour jumps, allowing quick time zone changes without disrupting the running of the movement.\u003c\/p\u003e\u003c\/section\u003e\n\n\u003csection class=\"spw-limited\"\u003e\u003ch2\u003eLimited Edition — Collector's Note\u003c\/h2\u003e\n\u003cp\u003eThis is a limited edition model. Please verify current availability with your authorised dealer.\u003c\/p\u003e\u003c\/section\u003e\n\n\u003csection class=\"spw-provenance\"\u003e\n\u003ch2\u003eAuthenticity \u0026amp; After-Sales\u003c\/h2\u003e\n\u003cp\u003eEvery watch sold by WatchPlaza is \u003cstrong\u003e100% genuine\u003c\/strong\u003e, supplied new in original Seiko OEM packaging with all original documentation. An official 3 years international manufacturer's warranty is included. Recommended service interval: 5–7 years. All WatchPlaza orders ship worldwide with tracking and full insurance.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003c\/div\u003e","brand":"Seiko","offers":[{"title":"Default Title","offer_id":53422034944337,"sku":"SPB501","price":1478.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/3531\/7585\/files\/SPB501J1.jpg?v=1783599565","url":"https:\/\/watchplaza.co.uk\/products\/seiko-prospex-spb501-padi-divers-watch","provider":"WatchPlaza","version":"1.0","type":"link"}