Seiko Prospex Sea Marinemaster 44.3 MM SS Automatic Black Dial Watch SLA021J1

Movement

Caliber Number: 8L35

Movement Type: Automatic with manual winding

Precision: +15 to -10 seconds per day

Power reserve: Approx. 50 hours

Jewels: 26

Functions

28,800 vibrations per hour (8 beats per second)

Stop second hand function

Date display

Case/Band

Case Material: Stainless steel (super hard coating) with stainless steel bezel

Case Size:

Thickness:15.4mm

Diameter:44.3mm

Lug-to-lug:50.5mm

Crystal: Sapphire crystal

Crystal Coating: Anti-reflective coating on inner surface

LumiBrite: LumiBrite on hands and index(es)

Distance between lugs: 20

Other Details

Water Resistance: 300m / 1000ft for saturation diving

Weight: 222.0g

Features

Unidirectional rotating bezel

Screw-down crown

One-piece structure

Three-fold clasp with secure lock