Antique US Army Military Supply Depot Advertising Sign World War 1 Era

This neat antique Military Supplies advertising sign would of hung at a US Army supply depot. It is hand painted on a board type material with a wood frame. It has nice patina with great original color and shows typical wear you would expect from a sign this old. We believe it would date to around World War 1 or slightly after and would of been done by a local painter so it is likely a one of a kind sign. It measures about 79" in length by 13" in width and about 2" thick. Circa 1920