SEIKO MEN'S SPORT SILVER AUTOMATIC SRPK31K1

Case & Exterior 

Case Material: Stainless steel

Case Diameter: 38.0mm

Case Thickness: 12.1mm

Lug-to-lug Distance: 44.2mm

Crystal: Hardlex

Dial Color: Champagne (or light beige)

Bezel: Unidirectional rotating bezel

Case Back: See-through & screw case back

Movement 

Caliber: 4R36

Type: Automatic, with manual winding capacity

Power Reserve: Approximately 41 hours

Functions: Day/Date display

Jewels: 24

Magnetic Resistance: 4,800 A/m

Other Specifications 

Water Resistance: 10 bar

LumiBrite: Applied to hands and indices for low-light visibility

Clasp: Three-fold clasp with push button release and secure lock

Lug Width: 20mm