This is a French Spriotechnique Mistral. I have not restored this one though it could be done very easily. I have a French Spirotechnique Royal Mistral that I dive quite a lot and love it. This was reported to be Cousteau's favorite regulator to dive with. This one has a rather early all metal mouthpiece T with no one way valves. The case was designed to look like a ship's wheel and at first glance gives off a Voit look to some. One problem with these regulators in the USA is that the nozzel is just a little too larges for American tank valves. before you can use one here in the USA you have to get the nozzel turned by a craftsman.