MADE IN THE USA! Tritium is more expensive but has a much longer luminosity life. Phosphorus is a good way to go too, you save a little bit of money. Either way, Cammenga makes a tough wrist compass that won't let you down! The World's No 1 Military Compass Built To The Demanding Specifications Of U.S. Fighting Forces NSN 6605-01-196-6971 Battle Tested - Shock, Water, Sand Proof And Functional From -50ºf To +150ºf Seven Tritium Micro Lights Allow For Navigation In Low-Light Conditions Equipped With A Magnifying Lens, Sight Wire, And Dial Graduations In Both Degrees And Mils To Ensure Accurate Readings Copper Induction Dampening System Slows The Rotation Of The Magnet Without The Use Of Liquids Built To Last With An Aluminum Frame And Waterproof Housing Includes Carrying Pouch, Lanyard, And Belt Clip "3H" Stamped On Back Of Actual Compass U.S. Made by CAMMENGA
