Seiko Presage 60's Style Open Heart 40.8 MM Automatic Black Dial Watch SSA425J1

Caliber Number: 4R39

Movement Type: Automatic with manual winding

Precision: +45 to -36 seconds per day

Power reserve: Approx. 41 hours

Jewels: 24

24-hour hand

Hacking seconds hand function

Case Material: Stainless steel

Case Size

Thickness:12.8mm

Diameter:40.8mm

Lug-to-lug:47.0mm

Crystal: Box-shaped Hardlex

LumiBrite: LumiBrite on hands and index(es)

Clasp: Three-fold clasp with push button release

Bracelet Length: 200.0

Distance between lugs: 20

Water Resistance: 5 bar

Weight: 140.0g

See-through & Screw case back