The Seiko SPB301J1 Prospex has a power reserve of 70 hours, curved sapphire crystal with anti-reflective coating on inner surface and SPECIAL EDITION on the case back.

Specifications

Movement

Caliber Number
6R35

Movement Type
Automatic with manual winding

Precision
+25 to -15 seconds per day

Power reserve
Approx. 70 hours

Jewels
24

Functions

• Stop second hand function
• Date display

Case/Band

Case Material
Stainless steel

Case Size

• Thickness: 13.2mm
• Diameter: 42.7mm
• 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
20mm

Other Details

Water Resistance
200m / 660ft diver's

Weight
180.0g

Features

• SPECIAL EDITION on the case back
• Unidirectional rotating bezel
• Screw-down crown
• Three-fold clasp with secure lock
• Screw case back