Seiko Prospex Alpinist Spb121j1 39mm green dial

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 seconds hand function

Date display

Case/Band

Case Material

Stainless steel

Case Size

Thickness:13.2mm

Diameter:39.5mm

Lug-to-lug:46.4mm

Crystal

Sapphire crystal with magnifier

Crystal Coating

Anti-reflective coating on inner surface

LumiBrite

LumiBrite on hands and index(es)

Band Material

Calfskin

Clasp

Three-fold clasp with push button release

Distance between lugs

20

Other Details

Water Resistance

20 bar

Weight

87.0g

Features

Rotating compass inner ring

Screw-down crown

See-through & Screw case back