Indiana Jones Voice That belongs in a museum! This mid-late 1800's era bellows is really a thing of beauty. It's a double acting piston bellows commonly used by blacksmiths and smelters. It's construction allowed air to be blown out on both strokes of the handle. It's constructed of wood, cast iron and leather. It's bones are good and sturdy but the leather has become a bit brittle with age. This is a rare and attention grabbing industrial oddity!