When I was young and foolish (1968, just before I went to Viet Nam), I bought a Rolex GMT Master with radium dials and hour markers. You could read the New York Times by it. I subsequently sold the watch for double what I paid for it, but I probably got a lifetime's worth of radiation while I was wearing it.
I've since considered buying a tritium watch. What's the life of the illumination - about ten years?
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Univ of Saigon 68