Seiko SSB427 Chronograph – Blue Dial

Key Features

• Precision Quartz chronograph with ±15 seconds/month accuracy

• Tachymeter scale for speed and distance measurement

• 24-hour hand, small seconds, chronograph up to 60 minutes, and date display

• 100m (10 bar) water resistance for everyday versatility

• Striking blue dial paired with stainless steel case and bracelet

• Durable Hardlex crystal with screw case back

Case & Build

• Case Material: Stainless Steel

• Case Size: Diameter 41.5mm, Thickness 12.1mm, Lug-to-Lug 46.5mm

• Crystal: Hardlex

• Clasp: Three-fold clasp with push button release

• Distance Between Lugs: 22mm

• Weight: 133g

• Screw case back

Dial & Visibility

• Blue dial with chronograph sub-dials

• Tachymeter bezel for functional timing

• Clear layout with contrasting sub-registers

Movement

• Caliber: 8T63

• Movement Type: Quartz

• Precision: ±15 seconds per month

• Battery Life: Approx. 3 years

• Functions:

  • Chronograph up to 60 minutes (1/5-second increments)

  • 24-hour hand

  • Small seconds hand

  • Date display

Durability

• Water Resistance: 100m (10 bar)

• Magnetic Resistance: 4,800 A/m

• Hardlex crystal for impact resistance

• Secure push-button clasp