Early 20th century scuba diving helmet

Early 20th century scuba diving helmet. Vintage metal and cast iron object from the beginning of the 20th century. Was used by scuba divers to explore the depths. Has visors at the front and sides, a hose at the back of the head to plug in an oxygen pipe. This scuba helmet has a natural patina related to its age and use. Matter: Metal / Fonte Period: Early 20th century