Prospex Alpinist Mechanical GMT - SPB377

Taking its name from the original and much-loved Seiko ‘Alpinist’ – launched in 1959 for Japanese ‘Yama-otoko’ mountain men, reliable in treacherous terrain – this watch further evolves the Alpinist specifications and overall design – with a legibility focus.

Its Arabic numerals are a signature feature of Alpinist pieces, whilst the curved sapphire glass, 24-hour display on the bezel and red 24-hour hand enhance the legibility further.

Ever practical, the watch features a compass functionality, whilst its super-hard coating gives it shine and strong scratch resistance. The in-house built 6R54 Calibre is the first mechanical GMT movement in a Prospex watch to have a three-day power reserve, allowing tracking of two different time zones at the same time.

Prospex is a combination of the words ‘Professional’ and ‘Specifications.’ Seiko Prospex timepieces are designed to be practical, reliable and durable; to meet the high standards required in extreme environments for sports lovers and adventure seekers alike.

Movement
Accuracy: -15/+25 seconds per day
Calibre: 6R54
Movement Type: Automatic with Manual Winding
Power Reserve: 72 Hours
Jewels: 24

Watch Case
Case Material: Stainless steel (Super Hard Coating)
Case Thickness: 13.6mm
Case Diameter: 39.5mm
Case Length: 46.4mm
Lug Width: 20.0mm

Exterior
Dial Colour: Blue
LumiBrite: Lumibrite on hands and indexes
Clasp: Three-fold clasp with push button release
Strap/Bracelet: Calfskin

Other Specifications
Water Resistance: 20 bar
Crystal Coating: Anti-reflective coating on inner surface
Crystal Type: Curved Sapphire Crystal
Other Specifications: Screw-down crown, See-through case back
Watch Function: Stop seconds hand function, GMT
Magnetic Resistance: 4,800 A/m