Silver Manhattan Project Pin (1945-1950)

This is the silver version of the Manhattan Project Pin—the version presented to individuals who worked with the Manhattan Engineer District (MED) for more than 18 months service during June 19, 1942 and August 6, 1945. A bronze pin was awarded for 6 to 18 months satisfactory service during the period.

This particular pin was given to Carl J. Irwin for his work with Stone and Webster at the Clinton Laboratories (now known as Oak Ridge National Laboratory) during the war.

Size: 0.7" in diameter

Manhattan Project was the common name for what was officially known as the MED, the WWII activities related to the development of the atomic bomb. The "A," of course, stands for "atomic." The castle shown on the bottom is the symbol for the Army Corps of Engineers. For this reason, the project's administrative headquarters building in Oak Ridge was known as the castle.

Kindly donated by Nancy and Jack Beck.