bfisher
Contributor
I had to vote "forever". Not only do I remember double hose regulators. I owned and used one. A VOIT Trieste to be specific. My original PADI cert card is dated Sept 10, 1969 if that means anything to anybody.
It was signed by Ralph Erricson and John Cronin, the originators of PADI, when they still worked out of a garage. Long beore the days of OWm AOW, Specialties and such. In fact, we didn't even have SPG's back then.
It was signed by Ralph Erricson and John Cronin, the originators of PADI, when they still worked out of a garage. Long beore the days of OWm AOW, Specialties and such. In fact, we didn't even have SPG's back then.