original and largely intact depression-era american industrial massive composite cautionary or warning "keep from under crane loads" safety sign designed and fabricated by the ready-made sign company, new york city, ny. the worn and weathered sign is single-sided with a baked on enameled finish over composite. the sign was salvaged from a huge a. finkl & sons rolling gantry crane shortly before demolition of the crane and building housing it. measures 20 x 28 inches.