Breathing apparatus.
Venice Naval Museum, Italy.
(Photo Cristiano D'Adamo)

Head gear.
Venice Naval Museum, Italy.
(Photo Cristiano D'Adamo)

Operator's controls.
Museo Navale della Spezia, Italy.
(Photo Cristiano D'Adamo)

Frontal view.
Museo Navale della Spezia, Italy.
(Photo Cristiano D'Adamo)

Head gear.
Museo Navale della Spezia, Italy.
(Photo Cristiano D'Adamo)