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Message: <blockquote data-quote="thor447" data-source="post: 3915632" data-attributes="member: 24867">I have a Geiger counter and test the older watches I work on.  I do take the proper precautions when needed, and ventilate outside when the dial and hands are removed/installed.  On this particular watch though, I tested it and it was not radium.  I've worked on a few in the past and have put together a setup to work on them when needed.FYI - the radium half-life for those dials and hands is 1600 years!  Even though they may not be luminous, they are still radioactive.  Thankfully, it is beta particles and cannot escape through the glass or skin.  Ingestion of beta particles can be a health risk though.  Proper precautions are taken in that rare event, but we were good to go on this one.</blockquote>