Seiko Presage Classic Series SPB521J1

Movement

Caliber Number	6R51
Movement Type	Automatic with manual winding
Precision	+25 to -15 seconds per day
Power reserve	Approx. 72 hours (3 days)
Jewels	24
Functions	24-hour hand Stop second hand function

Case/Band

Case Material	Stainless steel (super hard coating)
Case Size	Thickness: 12.5mm
Diameter	36mm
Lug-to-lug	41.4mm
Crystal	Dual-curved sapphire crystal
Crystal Coating	Anti-reflective coating on inner surface
Clasp	Deployment clasp with push button release
Distance between lugs	18mm

Other Details

Water Resistance	100m
Features	See-through & Screw case back