Many of the workers who painted the watch hands etc died of radiation poisoning in the early 20th century. Marie Curie who discovered radium also died of radiation poisoning.
---------- Original Message ----------
From: "SWISSNIXIE - Jonathan F." <jfrech...@gmail.com>
Date: March 16, 2018 at 1:12 PM
Nice to see other people with interest in radiation :)
The clocks are probably radioactive because of their paint on the watch hands. In the 1930's they used radium paint to make night glowing watch hands. Radium contains radioactive isotopes (Ra-226)
Before people got silly about radiation, radioactive material was used for quite a few consumer products like watch hands, vacuum tubes, uranium glass pottery, lantern mantles. Running around with a scintillation counter (more sensible geiger counter) on a vintage flew marked will usually bring up some items :)
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