This industrial-strength motor was made by Sterling Electric Motors during the 1930s, and is wired for 440 as well as 220 volts. It was installed during the 1930s by Charles Pagani as part of the continued modernization of his winery. Inside the large housing is a complex gear drive that reduces the mechanical energy generated to an appropriate output for operating equipment. The gearbox is also known as an epicyclic gear train, one that consists of one or more outer gears rotating around a central gear, so it's also known as a planetary gear train.