Seiko SSB445 Chronograph

A bold and sporty chronograph crafted with Seiko’s trusted quartz precision, designed for both everyday wear and active lifestyles.

Key Features

• Quartz movement (Caliber 8T63) with ±15 seconds/month accuracy

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

• 24-hour hand & small seconds sub-dial

• Date display

• Tachymeter scale on bezel

• 100m water resistance (10 bar)

• Sapphire crystal with high scratch resistance

• LumiBrite on hands and indexes for visibility in low light

Case & Build

• Case Material: Stainless steel

• Case Diameter: 43.0 mm

• Thickness: 11.6 mm

• Lug-to-Lug: 50.4 mm

• Screw case back

• Weight: 158 g

• Lug Width: 22 mm

• Clasp: Three-fold clasp with push button release

Dial & Visibility

• Dial Color: Blue

• Sapphire crystal for clarity and scratch resistance

• Tachymeter bezel for timing/speed calculations

• LumiBrite hands and indexes for readability day or night

Durability

• Water Resistance: 100m (suitable for swimming/snorkeling, not diving)

• Magnetic Resistance: 4,800 A/m

• Solid stainless steel build with secure clasp

• Scratch-resistant sapphire crystal