Seiko Chronograph – Cal. 8T63

Specifications

Movement

• Caliber Number: 8T63

• Movement Type: Quartz

• Precision: ±15 seconds per month

• Battery Life: Approx. 3 years

• Functions:

  • 24-hour hand

  • Small seconds hand

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

  • Date display

Case / Band

• Case Material: Stainless steel

• Case Size:

  • Thickness: 12.6mm

  • Diameter: 38.7mm

  • Lug-to-lug: 45.1mm

• Crystal: Box-shaped Hardlex

• LumiBrite: On hands and indexes

• Clasp: Three-fold clasp with push button release

• Distance between lugs: 20mm

Other Details

• Water Resistance: 5 bar / 50 meters

• Magnetic Resistance: 4,800 A/m

• Weight: 110g

• Features:

  • Tachymeter function

  • Screw case back

✨ This model stands out with its compact 38.7mm case, box-shaped Hardlex crystal, tachymeter scale, and LumiBrite accents – giving it a sporty yet vintage-inspired look.