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 it was actually introduced in October 1940. This example has only very minor paint chipping/rubbing on exposed edges and is clearly marked with Air Ministry, King's crown and reference numbers. Retains the original rubber "band" around the microphone on the reverse although this has hardened. The pale tan coloured loom is in very good condition and fitted with an early brown cased bell jackplug, stores ref. 10H/10991. Stock code O14154.