These have never been on a uniform. The item "US Army 2nd Chemical Mortar Battalion Bullion Patch and Tab Korean War 1951 RARE" is in sale since Sunday, February 04, 2018. This item is in the category "Collectibles\Militaria\Korea (1950-53)\Original Period Items". The seller is "bgm913" and is located in Butler, Georgia. This item can be shipped to United States.