Seiko Prospex King Sumo SPB321J1

Seiko Prospex King SUMO SPB321J1

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 (super hard coating)

Case Size: 

• Thickness:13.4mm
• Diameter:45.0mm
• Lug-to-lug:52.6mm

Crystal: 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: 190.0

Features

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