Hello Jan Willem, This is Don Russell here in California USA. Good to
hear from you at Christmas . I'm always amazed whenever I visit your
site it is always Totally different . In Regards to that strange La
Spiro technique Mouth Piece you have in your ULO Pile .
Yours is Obviously for an early French Double hose reg. The 1st
models that used those Screw on Hose connections were made for the
Military CG-45 Regs. They had 25 mm hose ends . The Civilian type
of Horns and hose ends were 20 mm . They were clamped on with
those 1/4" metal band clamps with the small square piece with about
a 1/4" square hole in the middle.
Strange last night I was digging around through some stuff that I
had piled up in a corner for a couple a years . I found one of
those Rubber mouth Pieces that looks just the same but it doesn't
have the metal Hose end fittings in it . I don't think mine was ever
used . Mine was made by a different Co. called SOUND WAVE SYSTEM INC.
I studied it for a while. It is a mouth Piece that Straps on to
your face and has an Air chamber in front of the divers lips. The
Air Chamber acts like a Microphone underwater. When using that
type of unit it allows divers to Talk underwater for a short
distance . Sound does travel underwater for a little ways .
Actually Whales and many other animals communicate for great
distances underwater . Some Whales can communicate with other
whales Many miles apart ,with their Songs
I just put my Unit up to my lips and talked into it . It worked
Very well and it sounded like I was talking into a Microphone. They
were invented many years ago, by who I don't know Probably Gagnan or
Cousteau? This one has 4 different Patent #'s on it.
USA, British, French, and Italian. Yours is probably the 1st mo. of
It's actually pretty incredible , It works Great! The sound Chamber
really Amplifies the Voice. I'm sure it would allow the user to
communicate with other divers several feet away. I saw a Sportsways
mask sell on ebay about 2 weeks ago . It also had a large
Chamber around the mouth area . Usually for a Purge valve but it
was Very large. I'm sure it was for underwater comunication like these
The one I have has the Cut outs for Double hose regs. plus it has
the port in front for a single hose mouth piece. So my guess is that
it was probably invented in the early 1960's.
I've been looking around your site today to try to find that
info you had up on the Italian Poseidon Pirelli Re breathers .
Also if you have any kicking around in your old spare parts
box. ? I could use a couple of the small 1/2" rectangular metal
pieces with the 1/4" square hole in them for the old style 1/4"
wide metal hose clamps .. They actually used the same type of clamps
on the Poseidon Masks on the metal Snorkel tube with the Red
Cork float on top . If you have a couple of those funky looking
old style clamp parts or if you know who might let me know . I could
easily make some new ones but I'd rather have a couple Crusty funky
looking old ones to match my 1940's CG-45 reg.
Anyhow Jan Willem - you take Care my Friend , Don Russell