In 1980, GSD introduced a new regulator with a completely original shape, but after that one-page advertisement, nothing more was heard of it. It was called Inner.
The first stage was based on the classic House of Avegno-design with a diaphragm and overpressure valve. It had a single medium-pressure port, but was equipped with a multiple connection with a swivel head and four outlets.
The second stage is of the up-stream type with pneumatic over-assisted system and is asymmetrical, with the diaphragm, quick-exhaust button, and mouthpiece on one side, while the body extends on the other side with a large curved "whisker" at the end of which is the exhaust valve. The hose connects to the opposite side of the exhaust and, given the shape of the body, is ambidextrous.
Beyond this essential information, nothing else has ever been learned. Who knows if there are any specimen out there, or if the project was limited to a single figure.
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