The Marinemaster is a high-end diver's watch that embodies the technology and expertise Seiko has developed in creating diver's watches.
Its appeal lies not only in its exceptional performance but also in the refined beauty of its exterior design and the meticulous finishing of its details.

The flagship model, the Marinemaster Professional, is designed to meet the more specialized and tough demands of professional divers.
Since the release of the first professional model in the Seiko diver's watch lineup in 1968,
it has been essential to balance both the functional prowess as a tool and the aesthetic appeal as an accessory.

The 60th-anniversary limited edition model, equipped with the newly developed Caliber 8L45 mechanical movement,
achieves unprecedented beauty and performance and is now available from the Marinemaster series.

Caliber Number
8L45
Movement Type
Automatic with manual winding
Power reserve
Approx. 72 hours(3 days)
Jewels
35
Functions
28,800 vibrations per hour (8 beats per second)
Stop second hand function
Date display
Case/Band
Case Size
Thickness:16.0mm
Diameter:45.4mm
Lug-to-lug:50.4mm
Crystal
Dual-curved sapphire crystal
Crystal Coating
Anti-reflective coating on inner surface
LumiBrite
LumiBrite on hands, index(es) and bezel
Clasp
Three-fold clasp with secure lock & push button release, solid & slide adjuster
Distance between lugs
22
Other Details
Water Resistance
600m / 2000ft for saturation diving
Magnetic Resistance
4,800 A/m
Features
LIMITED EDITION on the case back
Serial number engraved on the case back
Unidirectional rotating bezel
Screw-down crown
One-piece structure
Three-fold clasp with secure lock and extender