Civil Defence Telephonist Respirator Adaptor Set

This is a wartime period, telephonist adaptor headphone set. It allowed telephone operators to have their service respirators, plugged into their headsets. The set isn't date, but is numbered 'Number 6'. The respirator is 1937/38 dated and is in poor condition, at the back.
The headphone set is detachable and is in very good condition.

Code: 66076