Polish OM14 Respirator

Polish OM14 Respirator with a large EO14 filter.
The mask is very similar to the East German SCHM41 in terms of design and filter type. The differences being the OM14s filter is more of a water canteen shape and the metal on the inhale/exhale valve is a different material. The mask also appears to be actually white where most GP5 style masks are light grey.
The mask was used by Poland during the Cold war.

Polish MP4 Respirator

Polish MP4 Respirator nicknamed the "Bulldog".
It's a basic clone of the US M17 mask similar to other Warsaw PACT clones such as the OM10, M10M and the PDE-1 respirators. The most interesting variant of the M17 clones was the PBF mask which took circular internal filters and was smaller than the other clones.