Testing the S10 Gas Mask/Respirator

Testing the Avon S10 Gas mask/Respirator against an aerosol to test if it still works. The mask is dated 1981 and is using a standard green NATO NBC filter. The Avon S10 Gas mask was used by the British army from the early 1980s up until the mid 2000s when it was replaced in service by the Scott General Service Respirator.