Did you know some WW2 gas masks contain asbestos in their filters? Up until the 1960s, asbestos was commonly used inside the filters of these masks for heat resistance. However if the filter is damaged or deteriorating, it can release harmful fibres into the air. That’s why any potentially hazardous items in our collection are clearly identified, carefully handled with protective equipment, and stored in sealed, labelled containers to ensure everyone’s safety. #TheBlackWatch #BWMuseum #MilitaryH