Purchased from an estate sale in Hagerstown MD which is about 8 miles away from the Greencastle, PA Corning Ware Plant (now World Kitchens). 

These were employee pieces that were not sold to the public. The owner of this item was an employee at the plant and told auction staff that these were handed out one day to employees as they existed the building at the end of their shift. Each employee was given just one.