Duke railroad time keeper, Made in Austria. It has a Luminus dial and hands. That concerns me as a new comer to the problem. I recall as a youth back in the fifties, it was all the rage to have something that you could read in the dark. Watches had a premium attached if it had radiation. Ahah ha. As this Duke is from the forties or fifties, my concern is, should I check it over for radiation leaking, with a Geiger counter, before allowing it in my house. I suppose most railroader watches, were used outdoors and so radiation was not a major factor. Seems over the years a number of dealers have handled and owned the watch before me. No complaints...but then maybe they all died of cancer. Ahah ha. Bottom line. I have two of the Dukes, and want to someone's opinion , whether the luminous hands and face are dangerous to the user.... secondly, to anyone attempting to open and do repairs. I`m sure most clock workers do not keep a Geiger counter handy.