In 1979, US Divers introduced the Sea Otter BCV (not bcd) to replace its horse collar. It was the jacket style that was popular at the time and featured a convoluted belt/croth strap mechanism. Anyway, I need one to add to my USD collection. I’m also still looking for single 38 cf tanks and a USD Depthmaster I depth gauge. Message me if you have any of the above.