In speaking of the Silva Ranger, I should have stated it was the classic, undisputed king of the hill, a half century ago.
But, like everything else, something better will come along. Yes, they did get bubbles, but for a lot of years you could send it to the Canadian base at Toronto for a very few cents, and the company would remove the bubble and generally check it, before returning it to you, free of charge.
In use by the foresters in the bush, the compass took a terrible beating. They all carried it looped to their vest on about a ten inch cord. They would sight with it, then without removing their eye from their target, they would drop the compass and let it dangle on it's cord, until they advanced the two chains, 132 feet, then did it all over again.
I wonder if the new versions will take this kind of abuse?