The DA Aquamaster is the workhorse of the US Divers line and is one of the more ubiquitous double-hose regulators out there. It had an unbalanced 1st stage. It is relatively easy to maintain and is an easy breathing regulator.
I have one of these that appears to be in amazing condition for it's age. Hoses are there and are still soft and flexible. The chrome is shiny and bright, but does have scratches, no rust or green corrosion. If anyone is looking to purchase one, let me know.
