British Mk IV Service Respirator

The British Mk IV Service Respirator was made of tan fabricized rubber, with round glass eyepieces and a central speech diaphragm. It had a long corrugated hose leading to a large box filter. The design was very successful, and copied by several other countries. This example was made by Avon in 1941.
Similar masks in my collection: Czech Vz-33, Czech M-35/S, French Le Gallus, Yugoslavian M3, British Mk I
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