Seiko Prospex Alpinist 39.5 MM Green Dial Automatic Watch - SPB121J1

Caliber Number: 6R35

Movement Type: Automatic with manual winding

Precision: +25 to -15 seconds per day

Power reserve: Approx. 70 hours

Jewels: 24

Stop seconds hand function

Date display

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

Water Resistance: 20 bar

Weight: 87.0g

Rotating compass inner ring

Screw-down crown

See-through & Screw case back