This is the official U.S. military-issue tritium compass. It's been used by militaries, law enforcement and special forces (NSN 6605-01-196-6971). Made in the US by Cammenga, which has been the US government's exclusive manufacturer of this product since 1992.
Specifications and features:
Sapphire jewel bearing
Bi-directional rotating bezel
Functions in -50 to +150 degrees F
Cast aluminum frame
10-year luminous lifetime
Degrees & mils dial readings
Induction damping process (no liquid required)
For warranty issues, contact manufacturer:
100 Aniline Ave.
Holland, MI 49423