Here's another Over-Pressure, this time a Mistral conversion. I got it from Skip as a parts regulator, as it was missing the original yoke, yoke nut, body washer, HP guts, mouthpiece and hoses. The cans and HP valve are very nice and the duckbill is perfect. Odd how these O-Ps had rubber that lasted and lasted.
I put it together, replacing the missing parts with the usual single stage stuff and the original yoke with a Mistral part. The original fit very few tank valves. My first one had the original yoke and didn't fit any of my valves except the doubles with a USD manifold.
Here's some pics:
Note the original barbed nozzle with a bit of green hose on it.
[a href="https://flic.kr/p/KwtESP"]