This French company manuafactured various diving equipment ranging from lights to recompression chambers in the 1970-ies. One of the most impressing pieces of equipment was this 2 light Fiberglass E.I.P. 5 deep sea diving helmet. This demand helmet was ment for deep commercial dives on mixed gas. The diver could regulate the flow of breathing gas by a handle on the breastplate.

This integrated deep-diving equipment was manufactured by the Air Liquide Division. The complete equipment provides isolation from the exterior environment, diver's respiration, practically total recuperation of the gases exhaled by the diver and those used to equilibrate the pressure in the duit, heating the diver's body and the inhaled gases, emergency gas supply and telephone communications.

Old style constant volume diving mask. Picture contributed by Jean Pierre VAN TIL.
 

La Spirothechnique EIP 5 helmet and regulator.

Photo thanks to and copyright of NAUTIEK..