Celebrating the historic lineage of Japan’s first diver’s watch and Seiko’s ongoing partnership with the Professional Association of Diving Instructors, the Seiko Prospex 1965 Heritage Diver's PADI Special Edition 40mm SPB501J1 represents a milestone in professional aquatic engineering. Crafted in surgical-grade 316L stainless steel fortified with a DiaShield super-hard coating, this diver features a gradient emerald-green wave dial depicting the ocean surface as seen from beneath the water, an emerald-green unidirectional ceramic-styled bezel, and an upright date aperture discreetly positioned at 4:30. Powered by the upgraded in-house Seiko Calibre 6R55 automatic movement delivering a 3-day (72-hour) power reserve, a curved sapphire crystal, professional-grade 300-metre saturation-capable water resistance, a micro-adjusting slide clasp, and an additional sustainable Seichu woven strap, it delivers uncompromising tool-watch performance for ocean exploration and urban style.
Key Highlights
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Official PADI Special Edition Collaboration: Designed in partnership with PADI, the world’s leading scuba diver training organization, celebrating marine conservation.
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Upgraded 300-Metre Water Resistance: Engineered with a reinforced screw-down crown and case back to deliver 30 bar (300 m / 1,000 ft) water resistance.
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In-House Seiko Calibre 6R55: Advanced 24-jewel self-winding mechanical calibre beating at 21,600 vibrations per hour, offering a 72-hour (3-day) power reserve, manual winding, and hacking seconds.
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Emerald-Green Ocean Surface Dial: Shimmering gradient green wave-textured dial designed to mirror sunlight filtering through the sea surface.
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DiaShield Super-Hard Coating: Case and bracelet treated with Seiko’s proprietary surface-hardening technology to resist scratches and abrasions.
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Curved Anti-Reflective Sapphire Crystal: Ultra-hard sapphire crystal curved to optimize legibility and minimize underwater distortion.
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New Slide-Adjusting Diver's Clasp: Engineered with a compact micro-adjustment system providing six steps of tool-less expansion (up to 15 mm).
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Complimentary Eco-Friendly Seichu Strap: Includes an additional emerald-green woven NATO-style strap crafted from upcycled fishing nets using traditional Japanese kimono obi weaving techniques.
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Official Seiko 3-Year Manufacturer Warranty: Fully covered nationwide and internationally under Seiko’s official brand guarantee.
Design & Craftsmanship
The 1965 Heritage Evolution (62MAS Lineage)
Directly tracing its design architecture to Seiko’s legendary 62MAS from 1965—Japan’s inaugural professional diving watch—this reference refines classic tool-watch geometry for modern wear. Sized at an ergonomic 40.00 mm diameter with a compact 46.40 mm lug-to-lug distance, the case combines satin-brushed surfaces with mirror-polished Zaratsu-inspired bevels. The shortened lug profile and lowered center of gravity ensure a secure, comfortable wrist fit whether worn over a neoprene wetsuit or under a tailored jacket.
Sunlight Through Water: Dial Texture & Bezel
The emerald-green dial features a delicate wave pattern with a sunburst gradient that transitions from luminous green at the center to deep oceanic emerald at the outer minute track. Applied faceted indices and broad baton hands are generously filled with Seiko LumiBrite, emitting a bright blue-green glow in dark diving environments. To maintain symmetrical legibility, the date aperture is placed upright between 4 and 5 o'clock without disrupting the primary hour markers.
Calibre 6R55 & Multi-Terrain Strap Versatility
Inside beats the in-house Seiko Calibre 6R55 automatic movement, engineered for 72 hours of continuous autonomy. The multi-link stainless steel bracelet is equipped with Seiko's updated compact diver clasp, which allows wearers to fine-tune wrist sizing on the fly across six 2.5 mm increments. In addition to the steel bracelet, the package includes an eco-conscious green fabric strap produced from recycled ocean fishing nets and woven using the traditional Japanese Seichu technique for durability and comfort.
5 Reasons why you should buy watches from Zimson – Since 1948 , Celebrating 75 years
- Zimson is the authorised retailer for Seiko in India
- Zimson deals and sells only authentic watches and all the watches will be furnished with an invoice , brand warranty and brand packaging .
- Zimson is in the business of watch retailing since 1948
- Zimson has a strong after-sales service back up with state of art watch servicing facilities
- Zimson has gained the trust of over million customers throughout these years from our online www.zimsonwatches.com and offline stores present in Bangalore , Chennai , Kochi , Coimbatore , Salem , Madurai , Trichy and Pondicherry .
5 Frequently asked questions from our shoppers:
Are the watches sold at Zimsonwatches.com authentic ?
Ans: Yes , all the watches sold online at zimsonwatches.com and offline stores are 100% authentic and genuine .
Will the warranty be active if I buy online ?
Ans: Yes , all the watches come with brand warranty which can be from 1 yr to 7 years , depending on the brand which is ordered .
How soon can I get my watch once order placed ?
Ans: Once the order is confirmed , order will be processed within 24 hours and despatched within 48 hours and should reach the respective location in 2-3 working days from the time of despatch .
Which courier partner will be used to send the watch ?
Ans: Bluedart , DTDC Plus , Shiprocket .
Can I place order online and collect offline ?
Ans: Yes! One can place the order online and collect his or her watch offline at the desired store , prior information needs to be given so we can facilitate this .
