Seiko's Prospex collection is synonymous with sporty, precise, and reliable watches. The automatic Prospex SPB453J1 watch, entirely made of stainless steel with a scratch-resistant coating, is a perfect example. Waterproof up to 300 meters, it represents Seiko's excellence in the field of diving watches. Its striking black dial, with hands and markers coated in Lumibrite, is protected by a domed sapphire crystal with an anti-reflective coating and surrounded by black unidirectional rotating bezel.

Movement
Calibre 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 with extender
Distance between lugs: 20

Other Details
Water Resistance: 300m / 1000ft diver's
Magnetic Resistance: 4,800 A/m
Weight: 168.0
Unidirectional rotating bezel
Screw-down crown: Three-fold clasp with secure lock
Screw case back