Blalock
Oakley Beginner
- 12
- 51
For point of reference, I have a militiary issue U.S. Army lensatic compass by Stocker & Yale with tritium illumination. It was made in 1996 and the tritium vials on it are still glowing. They are not as bright as when I first got it about 10 years ago, but still good enough to read the compass points. I also have a Luminox watch with a tritium dial purchased in 2004 and the tritium vials are still nice and bright. Luminox estimates a 25 year life for the tritium illumination.