My new Complete CEF BEF Gas Mask

[CampX]

I picked this up a couple of weeks ago and am just getting around to showing it, these CEF BEF Gas Masks are very hard to find in Canada, many sell the more common American ones as CEF, however this one is correct as well is has the spare lens and the original anti-dimming agent.
I have never seen a complete one before, there may have been an instruction card in it at one time like the American ones, but I am unsure of this

I have not yet tried to open the mask, but I may do so after doing a bit of research

It also has a couple of long springy wires in the case, have not figured out their use yet

Dean O
Canada