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Waltham Wristwatch (50s/60s era) with luminous number indicators "Click" to Login or Register 
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.

Leo Horishny
Sun Valley, NV
Posts: 22 | Location: Nevada in the USA | Registered: September 20, 2021
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