Seiko Prospex Marine Master Mechanical Automatic 300M Diver 140th Anniversary Limited Edition SLA047

Seiko Prospex Marinemaster Mechanical Automatic Professional 300M Diver 
140th Anniversary Limited Edition Green-Dial "MM300"

SLA047
(JDM Version Model: SBDX043)

Limited Edition of 3,000 Pieces

 

A Dive into Heritage — Seiko’s Forest Green Tribute to 140 Years of Innovation

To celebrate Seiko’s 140th Anniversary, Watchoutz.com proudly presents the Seiko Prospex SLA047J1 (SBDX043)—a bold tribute to the iconic MM300 diver reborn in vivid forest green. Limited to just 3,000 Japan-made pieces, this exclusive release honors Seiko's enduring legacy and the lush beauty of Iriomote Island, one of Japan’s most revered diving destinations.

The SLA047J1 isn’t just a watch—it’s a statement of precision, heritage, and exploration. Its ceramic zirconia bezel offers unrivaled strength and scratch resistance, while the deep green dial channels the tranquility of mangrove forests kissed by early morning sun. A gold-accented second hand glides across the dial like sunlight piercing through dense foliage—subtle, powerful, unforgettable.

Inside, the hand-assembled 8L35 caliber powers this professional-grade diver with reliability worthy of the most rugged seascapes. A sapphire crystal with anti-reflective coating ensures clarity from every angle, whether above ground or 300 meters below. With full ISO-standard dive specs, this is a true tool watch infused with timeless artistry.

Every detail of the SLA047 is curated for serious collectors and seekers of rare Seiko craftsmanship. From its Japan-exclusive origin to its connection with Seiko’s founder Kintaro Hattori, this limited edition timepiece is your chance to own a slice of horological history infused with modern magic.

Available now at Watchoutz.com—your source for rare, authentic Japanese watches. This one’s a milestone. Don’t let it slip beneath the waves.

SLA047 Specification:

Movement
Caliber: 8L35
Movement Type: Automatic with manual winding
Accuracy: +15 to -10 seconds per day
Power Reserve: Approx. 50 hours
Jewel: 26

Exterior
Case Material: Stainless steel / ceramic bezel
Crystal: Sapphire crystal
Crystal coating: Anti-reflective coating on the inner surface
Case Size: Thickness: 15.4mm, Diameter: 44.3mm
Clasp: Three-fold clasp with secure lock & push button release, solid & slide adjuster

Other Details
Water Resistance: 300m / 1000ft for saturation diving
Date Display
Lumibrite on hands, indexes & bezel
Screw-down crown
Stop-seconds hand function
An additional silicone strap is included
LIMITED EDITION on the case back
One-piece structure
Unidirectional rotating bezel
 

 * Kindly note that the displayed image is either a graphic representation or a prototype and may not precisely reflect the final product. Color variations may occur due to differences in browsers, display settings, or devices used for viewing. Additionally, the orientation of the case back in the actual product may differ from what is shown in the photograph.