Vintage 1970's Hershey's Milk Chocolate Orange Promotional Pin-back Button. Wrapper Logo/Grid Variation/Lithograph Button. Made by Green Duck Co in Chicago, Illinois USA In The Early 1970's. Makers Mark/Rim Text CHICAGO USA On One Side Of The Upper Rim Of Button. Measuring 1 5/8in. In Diameter. Front Of The Button In Excellent Vintage Condition. Back Of The Button Straight/Sharp Pin/No Bends/Minor Shelfware On The Silver Part. In Great Vintage Condition pictures are a part of the description.