COLLAR DISC ENGINEER SET BY POLK ON ORIGINAL CARD KOREAN WAR. Set of collar discs from a lesser-known manufacture of Charles Polk from New York City. They are marked on the back of the disk. Nice, matched set on the original card. I have never had a set of collar discs from this manufacture. Very nice set from the Korean War period. These are the domed discs with 1 “US” and 1 “engineer”.
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