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A Tribute to Sixty Years of Japanese Diving Heritage:
- In 1965, Seiko changed the course of watchmaking history. Born from the movement that powered their official 1964 Tokyo Olympics Worldtimer, Japan's first professional diver, the 62MAS, was built not for display cabinets, but for work. Chosen by the Japanese Antarctic Research Expedition and trusted by professionals who needed equipment that would not fail them, it announced Japan's arrival at the highest level of precision instrument manufacturing.
- Sixty years later, Seiko honours that legacy with the Prospex SPB545J1 'Tranquil Teal', a modern recreation of the original 1965 diver, designed under the theme of 'The Great Wave', a reference to the iconic Hokusai woodblock print of the Edo period. Limited to just 4,000 pieces worldwide, this is the most refined, most capable, and most complete version of the 62MAS line ever produced.
- With every Prospex purchase, Seiko contributes to their Save the Ocean project, actively working to safeguard the world's seas for divers and marine life today and for future generations.
Designed with Heritage at Heart:
- Striking 'Tranquil Teal' sunray dial that shifts from vibrant sea-green in bright light to a deep, moody professional tone in the darkest conditions — one of the most beautiful dials in the current Seiko catalogue.
- A special silver-coloured dial pattern inspired by the wave symbol engraved on the caseback, a symbol present on every Seiko diving watch since the 1960s, originally designed to represent the highest grade of water resistance.
- Faithfully proportioned 40mm case with a refined 13mm profile and 46.4mm lug-to-lug measurement, slimmer, more curved, and more wearable than any previous 62MAS interpretation.
- Premium curved sapphire crystal glass for superior scratch resistance and exceptional clarity in daily wear.
- For the first time in a Prospex watch, a short-pitch bracelet featuring a micro-adjustable clasp, engineered for a precise, comfortable fit on the wrist.
- LumiBrite on hands, indices, and bezel ensures exceptional readability even at depth, in complete darkness.
- Date display positioned between the 4 o'clock and 5 o'clock position, keeping the dial clean and uncluttered.
Technical Confidence You Can Trust:
- Inside beats Seiko's in-house 6R55 automatic movement with manual winding capability, 24 jewels, and an exceptional 72-hour (3-day) power reserve, take it off Friday night, pick it up Monday morning, it's still running.
- Full ISO-compliant 300m water resistance, a professional standard that goes well beyond recreational diving, and a significant step up from previous 62MAS generations.
- Uni-directional rotating bezel with precise, secure operation, engineered to prevent accidental rotation and ensure elapsed dive time is never displayed as shorter than it actually is.
- Screw-down crown for enhanced water resistance and field security.
- Stop-seconds hand function for precise time-setting.
- Stainless steel case and bracelet with three-fold clasp, secure push-button lock, and solid & slide adjuster for security and comfort on the wrist.
- Complimentary extended warranty included with your WATCHO purchase, plus £80 store credit towards your next order.
- 3 years manufacturer warranty.
Why Collectors Love It:
- This isn't just a watch, it is the culmination of sixty years of Japanese dive watch heritage, arriving at a case, movement, and specification that finally asks collectors to make no compromises between vintage and modern performance.
- The 'Great Wave' design theme connects this piece to Japanese artistic and cultural history, giving it a depth of meaning that goes well beyond its technical credentials.
| Warranty | 3 years |
| Edition | Prospex |
| Dial Colour | Teal |
| Date Feature | Date display between the 4 o'clock and 5 o'clock position |
| Usually For | Men |
| Glass | Sapphire Crystal |
| Water Resistancy | 300 Metres |
| Case Width | 40mm |
| Case Thickness | 13mm |
| Case Shape | Round |
| Case Back | Screw |
| Case Material | Stainless-steel |
| Band Material | Stainless-steel |
| Band Width | 20mm |
| Band Type | Bracelet |
| Clasp Type | Three-fold Clasp |
| Bezel | Uni-directional |
| Bezel Material | Stainless-steel |
| Crown | Screw-down |
| Movement | Automatic with Manual Winding |
| Calibre | 6R54 |
| Jewels | 24 |
| Power Reserve | 72-hour |
| Accuracy | 15/+25 seconds per day |
| Magnetic Resistance | 4,800 A/m |
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