Seiko SSB455P1

The Seiko SSB455P1 is a confident everyday chronograph from the Discover More collection — a 40.0 mm men’s piece designed to move easily between the office, dinner and weekend wear. The polished stainless steel case is paired with a matching bracelet, a sapphire crystal and three subdials that give the watch its functional, sporty character without ever tipping over into showiness.

At the heart sits Seiko’s Caliber 8T63 quartz chronograph movement, accurate to within ±15 seconds per month and powered by a battery that lasts approximately three years. The chronograph measures up to 60 minutes in 1/5-second increments, with a 24-hour hand and small seconds hand keeping the dial layout balanced and informative. A practical date display and 10 bar (100-metre) water resistance make it ready for daily wear, light swimming included.

The case is 11.5 mm thick with a 45.8 mm lug-to-lug, sitting cleanly under a shirt cuff, while the 20 mm lug width keeps strap-swap options open. A sapphire crystal protects the dial from everyday scratches, and a screw case back seals the movement with the kind of quiet quality that has defined Seiko for nearly a century and a half. The matching stainless steel bracelet closes with a three-fold clasp with push button release for a secure, refined fit. With 4,800 A/m magnetic resistance, the watch also stands up well to common everyday magnetic exposure.

For anyone looking for a versatile chronograph that handles formal occasions, casual days and the small adventures in between with the same composed confidence, the SSB455P1 is a thoughtfully balanced choice.

Basic Information

Caliber Number: 8T63
Movement Type: Quartz
Precision: ±15 seconds per month
Battery life: Approx. 3 years
Weight: 152 g
Water Resistance: 10 bar (100-metre water resistance)
Magnetic Resistance: 4,800 A/m

Case and Band

Case Material: Stainless steel
Case Size (Diameter × Thickness × Lug-to-lug): 40.0 × 11.5 × 45.8 mm
Distance between lugs: 20 mm
Crystal: Sapphire crystal
Clasp: Three-fold clasp with push button release

Watch Features

Chronograph: Up to 60 minutes in 1/5 second increments
Calendar: Date display
Other features: 24-hour hand; small seconds hand; screw case back
Regular timekeeping: Hour, minute, second