SEIKO PROSPEX Land Alpinist SPB505J1

Specifications
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)
Case Size
Thickness:12.7mm
Diameter:39.5mm
Lug-to-lug:46.4mm
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
Other Details
Water Resistance
20 bar
Magnetic Resistance
4,800 A/m
Weight
147.0g
Features
Rotating compass bezel
Screw-down crown
See-through & Screw case back