Description
Seiko Prospex Alpinist GMT SPB377
A blue sunray dial, blue leather strap and red-tipped GMT hand give the SPB377 its distinctive Alpinist character. The automatic Caliber 6R54 tracks a second time zone and offers manual winding with approximately 72 hours of power reserve.
The 39.5mm stainless steel case has Seiko’s super-hard coating. A curved sapphire crystal with an inner anti-reflective coating protects the dial, while LumiBrite hands and markers aid visibility. An inner rotating compass bezel, screw-down crown and display caseback complete the design.
Specifications
- Model: SPB377
- Movement: Caliber 6R54 automatic GMT with manual winding
- Power reserve: approximately 72 hours
- Functions: dual-time display, date and stop-seconds
- Case diameter: 39.5mm
- Case thickness: 13.6mm
- Lug-to-lug length: 46.4mm
- Crystal: curved sapphire with anti-reflective coating on the inner surface
- Dial: blue sunray with LumiBrite hands and markers
- Strap: blue leather, 20mm lug width
- Clasp: three-fold with push-button release
- Water resistance: 20 bar / 200 meters
- Caseback: see-through, screw-down
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