Originally Posted by
M4tt
Smiths certainly did use radium lume, but almost certainly not on something as late as this, as it's probably from the seventies. If it was then after decades of ionising radiation, while the radium will be as radioactive as ever, the lume will be fried. If it wasn't, the radium would be providing more than enough energy to make it glow. As such, this is just more evidence, if needed, that that this is much later. Smiths carried on making pocket watches similar this to the very end - in Wales.
However, with any lume that may be a bit exciting it's worth keeping in a well ventilated place as the problem with radium lume in good condition is radon gas before any other risk.