This is a 1950’s or 1960’s Cold War era vintage gas mask.
It is made of rubber with adjustable rubber straps, glass eyeholes and a brass air outlet.
The filter screws into the mask from the bottom.
The filter is a Russian made GP5 filter and is in as new condition from unissued stock.
The mask itself has been issued and the bag may show signs of wear such as markings or numbers written onto the bag by the soldier it was issued to.
The mask is a traditional design and would look good for World War Two reenactments, fancy dress, etc.