SEIKO Prospex SPB545 - Pre-Order Available January 2026
SEIKO Prospex SPB545 - Pre-Order Available January 2026
This Save the Ocean Limited Edition is inspired by the beautiful ocean colors of Okinawa, one of the world’s premier diving destinations.
A dial that captures the beauty of Okinawa’s ocean waters
The ocean surrounding Okinawa is renowned for its breathtaking beauty, with crystal-clear water revealing white sandy seabeds. This watch features a sunray-patterned blue dial that reflects light beautifully, evoking the serene image of sunlight shimmering on the ocean’s surface.
A refined color combination
A refreshing blue dial paired with a subdued gray bezel creates a sophisticated and sporty aesthetic.
A new clasp designed for comfort and operability
The new clasp can be adjusted in six steps, each measuring about 2.5mm, for a total range of approximately 15mm. It allows for a comfortable fit at all times, accommodating changes in wrist size during diving and daily life.
Specifications
Movement
Caliber Number
6R55
Movement Type
Automatic with manual winding
Precision
+25 to -15 seconds per day
Power reserve
Approx. 72 hours(3 days)
Jewels
24
Functions
Stop second hand function
Case/Band
Case Material
Stainless steel
Case Size
Thickness:13.0mm
Diameter:40.0mm
Lug-to-lug:46.4mm
Crystal
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
20
Other Details
Water Resistance
300m / 1000ft diver's
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
Three-fold clasp with secure lock
Screw case back
In an actual product, the case back direction might be different from the photograph.




