USGI Military Cammenga Lensatic Compass Phosphorous (27) or Tritium (3H)

Military Lensatic Compasses  Military compasses are different from many models of compasses because you lift up the cover and then the eye piece and then aim at your next point that you want to go toward or if you are trying to follow a specific bearing at the closest identifiable point in the distance. Degree graduations are plus or minus one degree which is much more accurate than civilian compasses which average plus or minus 2 degrees for their degree graduations. The difference between the tritium compass and the phosphorus compass is the the tritium has a constant glow where the phosphorus stores up light releasing it over several hours but looses the ability to so light after a few hours, Tritium compasses will never loose this ability.  Glenn's Army Surplus, Inc. has a few available at this great price.

• Contracted by the US Military to Cammenga NSN# 6605-01-196-6971
• Built to specification MIL-PRF-10436N
• Battle tested through rigorous shock, water, sand proof and functional from -50ºF to +150ºF
• Seven Tritium Micro lights allow for navigation in low-light conditions without the need for a flashlight or any other light source and remains luminous for over twelve years, maintenance-free
• Equipped with a magnifying lens, sight wire, and dial graduations in both degrees and mils to ensure accurate readings
• The copper induction damping system slow the rotation of the magnet without the use of liquids
• Built to last with an aluminum frame and waterproof housing
• Degree markings are +/- one degree. 
  
• Lensatic eye piece for sighting point to point