A 7 inch by 8 inch gas mask with a hose and canister attachment, the canister attachment of this mask is rusted and broken off.
The device had larger eye-pieces and a ‘small box’ filter of active charcoal. As it was worn on the chest, it saved precious time during attacks. It offered five hours of complete protection against chlorine, phosgene, hydrocyanic acid, chloropicrin, and arsine.