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|IHC Menber 3062|
I'm curious to learn, after the radium trials and aftermath, what were the compounds used for phosphorescent watch dials and numbers?
Were there typical compounds used, or a certain range of compounds used for luminous dials? I understand that these questions likely fall under "proprietary" info, but as time's passed, what was used I imagine has now just become horology trivia.
Sun Valley, NV
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