Thanks Stilty,
Definitely the safe option is to not touch it at all and my preference is to keep it original. I do like a good lume however...
Actually you wouldn't believe it, the old tritium dial and hands are still giving off a very faint Radiant glow heh. If you look hard and wait for your eyes to adjust you can just make out the time.
I'd love to put it under a geiger just to hear it.
You have a nice weekend too.