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Hello Everyone

I have only recently become interested in tech diving and appreciate the
information and discussions that everyone has contributed.

The reason I am emailing is that I have an old mechanical decompression meter
(circa 1960's I think?) and would appreciate any information that anyone out
there in the techdiving world might have on this piece of equipment. I don't
intend to use it but it would be interesting to know how it was intended to
work.

The unit is rectangular (about the size of 2 cigarette packets), made from
stainless steel with a round gauge on the front. The rubber wrist/arm strap as
with the rest of the unit looks in excellent condition. There are a number of
patent numbers on the unit for USA, Italy, Germany, Switzerland, France, Spain
and U.K. The words "Made in Italy" are written on the gauge face along with many
other numbers and graduations. A brand name "SOS" with a small lightening bolt
above the "O" also appears here.

Before I go tracing back through patent numbers etc, can anyone help me. I
couldn't find anything on the net about a company called "SOS".

Any help would be appreciated

Thanks

Stephen Kamarudin
Newby tech enthusiast
Western Australia


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