STM-300 Semi-Closed RB

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jadairiii

jadairiii

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This is from a 1975 Skin Diver mag ad. Anyone ever see one of these in real life or used one? Seemed like it was way ahead of it time. Like to see pictures of the insides.
 

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Wow, from Cabo Rojo, Puerto Rico. I never heard about it and I was living in PR at the time.

I would also like to know more about.
 
Very interesting! I remember the Electro-Lung that Starck came up with but never heard of a STM-300.
 
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