Seiko Prospex Marinemaster 1968 Heritage Diver’s 300M Mechanical Automatic
SBDX065
(Intl. Version Model: SLA079)
🌊 SBDX065 — The Pinnacle of Seiko’s Dive Legacy
From the icy silence of the poles to the crushing depths of the ocean, Seiko’s dive watches have long been trusted by explorers who push the boundaries of Earth itself. The SBDX065 Marinemaster is not just a watch — it’s the culmination of six decades of relentless innovation, forged for the elite few who demand absolute performance.
The Seiko Marinemaster SBDX065 is engineered for uncompromising performance with 300m air diving water resistance, making it a trusted companion for serious underwater missions. Its dual-curve sapphire crystal, treated with inner anti-reflective coating, ensures exceptional clarity and reduced glare even in the most challenging deep-sea conditions. The high-contrast matte dial, finished with a sand-textured surface, features bold indexes and hands generously coated in LumiBrite for outstanding legibility in darkness. Proudly printed with MARINEMASTER and DIVER’S 300m, the dial signals its elite status within Seiko’s professional dive watch lineage.
The case design, inspired by the iconic 1968 high-beat diver, showcases a mirror-finished surface with bold, distortion-free lines — a hallmark of Seiko’s signature craftsmanship. Functionality is further enhanced with a redesigned bezel and crown knurling, offering superior grip and ease of operation, even with gloves. Beneath the surface, the threaded crown pipe architecture introduces a hidden structural innovation, where the crown is secured via a dedicated threaded component rather than directly into the case — significantly improving durability and extending the lifespan of the watch.
The SBDX065 isn’t for everyone. It’s for those who go deeper. Available now at Watchoutz.com — where legends surface.
SBDX065 Specification:
Movement
Caliber: 8L35
Type: Mechanical Automatic with manual winding
Accuracy: +15 to -10 seconds per day
Duration: Approx. 50 hours (fully wound)
Functions: 24-hour hand (dual time display function); Stop second hand function
Jewel: 26
Frequency: 28,800 vph (8 vph)
Second-hand stop function
Calendar (date) function
Exterior
Case Material: Stainless Steel
Case Coating: DiaShield
Case Size: Thickness: 13.4mm; Width: 42.6mm; Height: 49.3mm
Crystal Material: Dual-Curve Sapphire
Crystal Coating: Anti-Reflective Coating on the Interior
Lumibrite Light: Yes (Hands, Indexes, Bezel)
Clasp: One-Push Diver Extender
Wrist Length (Maximum): 210.0mm
Other Details
Water Resistance: 300m (air diving water resistance)
Magnetic Resistance: Yes
Weight: 196.0g
Unidirectional rotating bezel
Screw-lock crown
Double-lock clasp
Screw-caseback
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