Seiko Prospex SPEEDTIMER HBD002J1

Movement

• Caliber Number: 8R48
• Movement Type: Automatic with manual winding
• Precision: +25 to -15 seconds per day
• Power reserve: Approx. 45 hours
• Jewels: 34
• Functions: Chronograph with 30 minutes & 12 hours, Stop second hand function, Date display

Case/Band

• Case Material: Stainless steel (super hard coating)
• Case Size: Thickness:14.6mm, Diameter:42.0mm, Lug-to-lug:49.5mm
• Crystal: Dual-curved sapphire crystal
• Crystal Coating: Anti-reflective coating on inner surface
• LumiBrite: LumiBrite on hands and index(es)
• Band Material: Cow leather
• Clasp: Three-fold clasp with push button release
• Distance between lugs: 20

Other Details

• Water Resistance: 10 bar
• Magnetic Resistance: 4,800 A/m
• Features: Tachymeter function, Screw case back