The 'Proto' self-contained breathing apparatus was manufactured by the Siebe Gorman Company c ... front of the user with leather straps and a belt. The 'Proto' self breathing apparatus on display ...

It was made for admiralty during WW1 by Siebe Gorman, submarine engineers. It is made of copper and brass and would have been used with a two man diving pump.

The 'Proto' self-contained breathing apparatus was manufactured by the Siebe Gorman Company c ... front of the user with leather straps and a belt. The 'Proto' self breathing apparatus on display ...