I was issued this somewhere around 1999 or 2000.
http://www.marathonwatch.com/assets/u/ww194006l.jpg
I have only taken it off for a one month stint to replace the rubber watchband that finally gave way in 2009. It survived many countries and several engagements, but the crystal is still unmarked...the bezel, well...its a bit dinged up.
Love the tritium gas lights...so bright I have been able to use it as a low level flashlight in pitch black.
It still runs a few seconds fast per 24 hours, but most automatic watches do.
More info here.
http://www.marathonwatch.com/products/item/marathon-watch-wrist-diver-automatic-GSAR/