That is an original Broxton Ave. (also know as original Trademark) regulator, but it has a Dacor hose loop.
The label is in very good shape. The green label was the third (out of four) color labels and it was around between 1952 to 1953.
I don't know why some of the labels are up-side-down, but I have seen this before. I think it was just a factory error, which could add to the collectors value, but I am not sure about that.
Over all it looks in very good shape, but the hose loop is definitely wrong for a collector (or for a diver, I would never dive with that hose loop).