Vintage Large Industrial Diehl Black Oscillating Fan. Manufactured by Singer Mfg. It has not been determined when Diehl became a part of the Singer Mfg company. The fan has been cleaned including its inner gears and lubed again. The Fan also has been given a fresh coat of the original black paint. At some point it appears part of the fan has been rewired. The fan works flawlessly at all three speeds as it was designed. The circulating operation of the fan is working intermittently. Recommend the fan be serviced if you intend to use it regularly. The fan is industrial grade and a heavy (22 pounds). Made to last for years and years.