This VOIT lung is the over pressure version.  It came to me with perished hoses and mouthpiece.  I have since replaced them with new reproduction silicone.  I also did not use the tinnerman clamps as they are not conducive to diving in salt water, removal for inspection and cleaning, or hose durability.  I dive almost all of my regulators so the tinnerman clamp must go.  This regulator was rebuilt by Bryan of www.vintagedoublehose.com and it breathes like a champ.  I used this regulator on many dives in Silver Springs during the 50th anniversary  of SEA HUNT.  With these green hoses and mouthpiece it really stands out.

The Scuba Museum, a must in VINTAGE SCUBA.