First Production Run of Trefoil Warning Sign with Yellow Background (1948)

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
Copyright 1999, Oak Ridge Associated Universities