Czechslovakia protective mask "OR-1"

Not quite a gas mask, but close. These are neat civil defense protection face masks produced in Czechoslovakia from the 1960's. A hard to find mask, especially in the U.S. and could make for a great prop or Czech display. All appear to be NOS. Size picked at random, feel free to shoot a message if you desire a specific size. 

Intended as a collector's item and not for protection against the elements!