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abzoid posted an update Monday, May 14, 2012, 9:14am EDT, 13 years, 4 months ago
Marty - The gov't ban on the use of uranium started in 1943 and was lifted in 1958.
There's a second book on LG Wright, that I don't have, that is mostly catalog reprints. It may be possible to get more specific information on years that specific D&B colors were offered by looking at those reprints.