The British Hospital Respirator was a special purpose civilian respirator designed for use by hospital patients who were bed-ridden with sickness or head wounds. The mask has a large clear plastic visor, which allowed medical personnel to easily see the patient\'s face. A long corrugated tube connected to a bellows was used to pump in filtered air. The bellows could be operated by the patient or by a care taker. In excellent,clean condition. Heavy item.