Seiko Prospex Alpinist SPB121J1. This timepiece is from the Alpinist collection, first launched in 1959 exclusively for the Japanese market. Designed for Japanese ‘Yama-otoko’ mountain men, to be reliable in treacherous terrain, these are part of the Land collection.Hugely popular with many fans worldwide, these new designs are now available globally with an upgraded specification from their original inspiration – a longer power reserve of 70 hours and a glass upgrade to Sapphire glass.Seiko Prospex watches are designed for sports lovers and adventure seekers in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.
Toulson Jones Jewellers are official Seiko stockists
Seiko Prospex Alpinist SPB121J1.
Movement
Caliber Number
6R35
Movement Type
Automatic with manual winding
Precision
+25 to -15 seconds per day
Power reserve
Approx. 70 hours
Jewels
24
Functions
- Stop seconds hand function
- Date display
Case/Band
Case Material
Stainless steel
Case Size
Thickness:13.2mm
Diameter:39.5mm
Lug-to-lug:46.4mmCrystal
Sapphire crystal with magnifier
Crystal Coating
Anti-reflective coating on inner surface
LumiBrite
LumiBrite on hands and index(es)
Band Material
Calfskin
Clasp
Three-fold clasp with push button release
Distance between lugs
20
Other Details
Water Resistance
20 bar
Weight
87.0g
Features
- Rotating compass inner ring
- Screw-down crown
- See-through & Screw case back