Forgive me if I'm just being daft here but do we not have a page for the C3 gas mask on the wiki?
It would be incredibly ironic if we don't, considering that it is part of the gas mask and respirator wiki's logo.
Perhaps some of us can get together to create a page for it. I might go ahead and do it after I finish my page on the L702 mask (I've been incredibly busy lately, so I haven't been able to get around to doing it).