Assortment of 4 Vintage WW2 & Korean War U.S. ARMY Chevrons

1 Korean War Corporal chevrons, blue on gold/yellow background 

1 WW2 US Army Air Corp Tech Corporal chevrons/stripes

1 WW2 US Army Air Corp PFC chevron/stripe

1 WW2 US Army Air Corp Corporal chevrons/stripes