Seiko Presage SPB527 Classic Series Blue Dial Heartbeat Automatic

Movement: Automatic 

Caliber: 6R5J

Precision: +25 to -15 seconds per day

Power Reserve: Approx. 72 hours (3 days)

Jewels: 24

Case Material: Stainless steel (super hard coating)

Case Diameter: 40.2mm

Case Length (Lug-to-Lug): 46.0mm

Case Thickness: 13.0mm

Crystal: Dual-curved sapphire crystal

Crystal Coating: Anti-reflective coating on inner surface

Clasp: Deployment clasp with push button release

Lug Width: 20mm

Water Resistance: 10 bar

Magnetic Resistance: 4,800 A/m

Case Back: See-through & Screw case back

Functions:

• 24-hour hand
• Stop second hand function