Prototype Trefoil Warning Sign with Yellow Background (1948)

This is the prototype of the radiation warning sign 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