Hamilton Standard Propeller Co. 15 Years Service one piece stamped gold oval lapel pin; red enamel field at center with gold propeller, gold letter text "15 YEARS" and words black enamel text "HAMILTON STANDARD PROPELLERS" around edge. Created by Jason A. Smith Date Created 05/27/2015 Source National Air and Space Museum, Smithsonian Institution. Keywords Aviation; Awards Rights and Restrictions Not determined
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