| First Production Run of Trefoil Warning Sign with Yellow Background (1948) |
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This is from the first production run of radiation warning signs employing a yellow background (from Oak Ridge National Laboratory). Note the staples attaching the magenta trefoil cut from one of the Berkeley magenta-on-blue signs. For more information, go to the Radiation Warning Signs page and push the Info Button. Donated by George Warlick |
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Last updated: 07/25/07 |