unique american depression era single-sided rough cut heavy gauge steel "no parking" city of chicago street sign, likely fabricated "in-house" by the chicago deaprtment of streets and sanitation. the brightly colored metal sign contains hand-painted bold black lettering against a yellow background. contains a multitude of holes for mounting flush against a building, underpass or perhaps a bridge truss located near a city street. surface wear, in the form of discoloration and soilment. measures 18 x 9 1/2 inches.