From the Alpinist collection, first launched in 1959, these watches were designed for Japanese ‘Yama-otoko’ mountain men to be reliably rugged in treacherous terrain.

Under the sapphire crystal glass, the archive-inspired black dial is complemented by ‘cathedral style’ hour and minute hands, accompanied by classic Arabic numerals and wedge-shaped indices. It features the traditional Alpinist logo under the Seiko logo, which featured on the very first 1950s Laurel Alpinist. The ‘Mountain Device’ logo features on the caseback of these watches, an aspect of the vintage original indicating the field nature of the watch. The case has an applied super-hard coating for increased scratch resistance and shine.

Through the exhibition case back, the in-house automatic 6R55 calibre can be viewed, accurate to -15/+25 seconds per day, with a power reserve of 72 hours.

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

Movement:

• Caliber Number: 6R55
• Movement Type:  Automatic with manual winding
• Precision: +25 to -15 seconds per day
• Power reserve: Approx. 72 hours(3 days)
• Jewels: 24

Functions:

• Stop second hand function
  

Case/Band:

• Case Material: Stainless steel (super hard coating)
• Crystal: Sapphire crystal with magnifier
• Crystal Coating: Anti-reflective coating on inner surface
• LumiBrite: LumiBrite on hands and index(es)
• Clasp: Three-fold clasp with push button release
• Distance between lugs: 20mm
• Case Size:
  
  • Thickness:12.7mm
    
  • Diameter:39.5mm
    
  • Lug-to-lug:46.4mm

Other Details:

• Water Resistance: 20 bar
• Magnetic Resistance: 4,800 A/m
• Weight: 147.0
• Features: 
  • Rotating compass bezel
  • Screw-down crown
  • See-through & Screw case back