Probably non military (industrial?) use.... there are no WaA markings.....
btw, it's a CO Filter, but you probably knew that
THX Tom, still an interesting item! (and was only 3 EU)
I wonder what kind a gasmask was used for this...
(no luck so far with google search)
btw., those CCCP filters (shaped like this one) are only 18 cm tall - this one is 30 cm tall, so actually is quite large. (when I receive it, I'll update)
The CO-filter has arrived today - along with a rare WW2 Hungarian jerry can - I took some quick shots. It is quite heavy - my guess; around 5 kg...
I placed it right next to the jerry can, for size compare:
The 2 signs/logo on the front with text (both blue and white) - is actually a decal - same type as on helmets.
The one you picture is a GM 24, but the hose is not the normal GM24 one.....
Will try to posts some pictures tonight