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| Joined: | Tue Apr 4th, 2006 |
| Location: | Kentucky USA |
| Posts: | 2722 |
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The dial had luminous indicators and hands. They used paints that fluoresce with UV light also Marc, but the mineral crystal has so much UV coating on it the best way to get it to fluoresce is to use the battery power to turn on the UV illuminator for 2.5sec +/-.