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My first B.C. in 1999 was a U.S. Divers Seamaster, back mount with 50lbs of lift. I also had a U.S. Divers (Yellow.) Horse Collar, and a Seaquest (Orange.) Horse CollarTechnical gaffe . . .
Hi @Bigbella
Did your Seatec have a low pressure inflator? I had a similar Scubapro model that I bought in 1972. It was a separate vest but had an inflator, very advanced, just like the SPG I bought at the same time. It was also used a hard backpack on the tank, a steel 72.