These are photos of an RCAF Gutta Percha mask in my collection. As far as I can tell it is complete. It was sent to me by an 85 year old former RCAF pilot friend of mine. One of his postings was with RCAF Coastal Command, flying Cansoes (PBY's) on Atlantic anti-submarine patrols. The first of the photos is of his RCAF "B" type helmet Mk VIII goggles and his Gutta Percha mask. The Gutta Percha mask was a "rebreather" system much like the USN MSA oxygen masks. The rebreather canister does have a large alligator clip attached. There does not appear to be any provision for a mic and I was told that the hose may be attached to either of the two front valves. It attached with a head strap configuration again, much like the Navy MSA masks. Hope these photos help. If you would like any different shots just let me know.