Danish M/69 gas mask (Canadian C3 gas mask)
The Danish M/69 gas mask is basically the Canadian C3 gas mask in all its splendour and glory. My own mask a size medium, and is manufactured in 1985. The Danish Home Guard used these masks up until recently, but as of 2000 they have been redrawn from service, as far as I know. (Please correct me if I am wrong.
The voice-box of the mask is aluminium, but the "ribs" keeping the net in place is plastic.
I think it is to keep it lightweight? But in my opinion it would have been more practical to have used aluminium for all the non-rubber components.
I do believe it has this economy "downgrade" because this C3 mask is the export model, but I am not entirely certain.
The mask is originally designed for a 60 mm filter, but was used with a 40mm NATO filter in Denmark. It used a special adapter, that came with every new filter package.