SPB377 39.5mm

Made in Japan on dial and on case back

Prospex Alpinist Mechanical GMT. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style.

powered by Seiko in House Cal 6R54

With manual winding capability

Power reserve 72 hours

Curved sapphire crystal with anti-reflective coating on the inner surface

inner rotating compass bezel 

24-hour GMT bezel

Dial brilliant blue sunray 

LumiBrite hands and markers

see-through screwdown caseback

Stainless steel case with super-hard coating

Blue calf leather strap with tri-fold push button release clasp