East German issue PBF gas mask kit, these were issued to troops like the Grenztruppen during the mid to late 80s. Produced and imported from the Soviet union. They had special rubberized
Maska p-gaz PBF (Chomik), szara
Maska Przeciwgazowa PBF - Recenzja i Prezentacja - YouTube
Face mask gas mask Polish Only Mask Genuine respiratory surplus 1970's vintage | eBay