Seiko Prospex Alpinist GMT Automatic – SPB377
Seiko Prospex Alpinist GMT Automatic – SPB377

Seiko Prospex Alpinist GMT Automatic – SPB377

SKU: 001-545-11156

Regular price $1,150.00

The Seiko Prospex Alpinist GMT SPB377 epitomizes adventure with a nod to Seiko's historic excellence in sports watchmaking. Drawing inspiration from the 1959 Alpinist, it features iconic wedge-shaped markers, bold numerals, and stylized hands. A curved sapphire crystal with anti-reflective coating ensures clear visibility, while an inner rotating compass bezel enhances its suitability for outdoor pursuits like hiking. The sunray dial, in a striking blue hue, incorporates a date calendar, LumiBrite hands, and markers for low-light scenarios, along with a distinctive red-tipped GMT hand.

Powered by a 24-jewel automatic movement, visible through the transparent screwdown caseback, it beats at 21,600 vibrations per hour, offering an impressive 72-hour power reserve and manual winding capability. The stainless steel case features a robust super-hard coating and a secure screw down crown. With a water resistance of 200 meters (20 bar), it's well-equipped for aquatic activities. The watch is complemented by a blue calf leather strap and a tri-fold push button release clasp. The Seiko Prospex Alpinist Mechanical GMT SPB377 is a fusion of rugged style and advanced functionality, tailored for those who relish life's greatest adventures.
Band Strap with Deployant Clasp
Band Color Blue
Band Material Cow Steer
Caliber 6R54
Case Material Stainless Steel
Case Size 39.5mm
Case Thickness 13.6mm
Caseback Display
Clasp Folding
Collection Prospex
Collection 2 Alpinist
Crystal Sapphire Crystal
Dial Blue
Function GMT
Gender Men's
Lug Width 20mm
Lug-to-Lug 46.4mm
Movement Automatic
Power Reserve 72 Hours
Water Resistance 200m


Little Treasury Jewelers is the watch and jewelry store destination for the greater Baltimore-Annapolis area. Providing a piece for all of life’s occasions, offering a collection of wedding and engagement jewelry, fine timepieces, children’s jewelry, and gifts. With a selection of fine watches unequaled in the area, international jewelry designers, and a repair facility on the premise, Little Treasury is truly a “hidden gem” in Maryland.