Seiko Prospex Marinemaster Mechanical Automatic Professional 300M Diver New "MM300" Blue Dial
SLA023
(JDM Version Model: SBDX025)
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Dive Deeper: Seiko SLA023 MM300 Redefines Ocean-Grade Elegance
Built for the deep. Designed for distinction. The Seiko Prospex Marinemaster SLA023, also known as the JDM-exclusive SBDX025, is a professional-grade 300M diver’s watch that embodies the pinnacle of Japanese engineering and ocean-tested reliability. This is the new-generation MM300 — a bold evolution of Seiko’s iconic dive heritage, now dressed in a mesmerizing marine blue.
A Dial That Captures the Deep
The SLA023’s blue dial evokes the shifting hues of the ocean depths, enhanced by Lumibrite-coated hands and indexes for unmatched legibility in low light. The ceramic bezel adds durability and a sleek contrast, while the monobloc case construction ensures structural integrity under extreme pressure.
Own the Seiko Prospex SLA023 MM300 Blue Dial — a timepiece that blends rugged performance with refined aesthetics. Whether you're diving into the deep or navigating daily life, this watch delivers uncompromising style and substance.
Secure yours today!
SLA023 Specification:
Movement
Caliber: 8L35
Movement Type: Automatic with manual winding capacity
Accuracy: +15 to -10 seconds per day
Power Reserve: Approx. 50 hours
28,800 vibration/hour
Antimagnetic
Jewel: 26
Exterior
Case Material: Stainless steel with ceramic bezel
Case Size: Diameter 44.3mm, Thickness 15.4mm
Crystal: Sapphire
Crystal Coating: Anti-reflective coating on the inner surface
LumiBrite: Lumibrite on hands and indexes
Clasp: Three-fold clasp with secure lock & push button release, solid & slide adjuster
Other Details
Water Resistance 300m
One-piece structure
Screw-down crown
Unidirectional rotating bezel
Date display
Stop-seconds hand function