The Vajen-Bader Patent Smoke Protector of the 1890's and early 1900's sealed off the wearer's head from the environment and supplied breathable air from a compressed air cylinder on the back of the helmet. The helmet was fabricated by Vajen Helmet Co. in Richardson, Indiana. Helmet Dimensions: H 18.5 in. x W 10 in. x D 16 in Box Dimensions: L 21 in. x W 13 in. x H 15 in.