Cammenga is one of the two suppliers to the military...
I had one of the ones with the Tritium and loved it...
Always worked perfectly...
Then, one day, not long ago, I took it out and the needle will not turn???
I keep forgetting to check which of the two companies made it and see if they will repair it...
I kept it in perfect condition, so I do not know what went wrong with it...
This is not to imply that there is anything wrong with that type of compass... Every thing you buy has a chance of breaking, even in ways that you cannot tell what went wrong(as in this case).
This compass was over 10 years old when it stopped working anyway... The Tritium vials still glowed strongly, though not as strongly as when new...
Tritium has a half life of 11 years, if I remember correctly, so it should be about half as bright as it was when I got it, and that seems about right, as it was VERY bright when I got it!.
My oldest compasses that still work are my over 30 year old BSA baseplate compass(air filled), and my K&E pocket transit(almost exactly like the Brunton).
This is the Brunton...