US Army WW2 first aid tin with Sulfanilamide

A further effort was made by the U.S. Government in 1942 to easily identify Packets which contained Sulfanilamide (but without indication of same). Existing Packets (previous production runs) were therefore recalled, the Sulfanilamide Shaker Envelope added and the Packet refinished in a red-orange colored paint to identify the Packet as containing Sulfa.