As I see my old Hans Hass films, I noticed that the commonly referred to as "Hans Hass rebreather" known device is apparently not the first ever by Hans Hass used rebreather.
I think the first was a "pseudo pendulum Rebreather." That means the lime was used double like a pendulum and only the breathing hose was split in two. This device was in the very first dives in the Aegean used. The breathing bag is very similar to the Draeger Gegenlunge. Who knows about what?
This contribution arose because Hans Hass THE hero of my youth and I admire him very. Unfortunately, my dreams earlier were not realized ...
The use of the Vidcaps courtesy of Michael Jung, Hans-Hass-Institute.