Seiko Prospex Speedtimer Chronograph 42.5 MM Automatic Watch SRQ043J1

Movement

Caliber Number: 8R46

Movement Type: Automatic with manual winding

Precision: +25 to -15 seconds per day

Power reserve: Approx. 45 hours

Jewels: 34

Functions

Equipped with small seconds hand

Stop seconds hand function

Case Material: Stainless steel (super hard coating)

Case Size

Thickness:15.1mm 

Diameter:42.5mm 

Lug-to-lug:50.0mm

Crystal: Dual-curved sapphire crystal

Crystal Coating: Anti-reflective coating on inner surface

LumiBrite: Lumibrite on hands and index(es)

Clasp: Three-fold clasp with push button release

Water Resistance: 10 bar

Magnetic Resistance: 4,800 A/m

Features

See-through case back

Screw case back

See-through & Screw case back