External flying helmet wiring loom. Stores ref. 10H/10353. Type Q loom wired to a type 20 microphone (type 21 when 'mounted' as here) ready for fitting to a type D oxygen mask. The type 20, stores ref. 10A/11994 has a black painted alloy casing and is often referred to as the "1941" pattern although actually introduced in October 1940. It has some paint chipping/rubbing on exposed edges. Air Ministry and King's crown markings. Retains the original rubber "band" around the microphone on the reverse although this is hardened. The pale tan coloured loom is soiled but in very good condition and has been coiled in the way that many airmen did to shorten the cable and keep it out of the way. The loom is fitted with a black cased bell jackplug, stores ref. 10H/10991. Original RCAF stores label attached. Stock code O13126.