Stores Ref. 10A/12572. Distinctive black painted 'ball-shaped' microphone housing with angular metal on/off switch mounted on the top. Complete with remnants of the original wiring loom and the rubber grommet at the point where the loom enters the housing. Minor dents on the main housing. It retains approx. 45% of the original paint although rather dulled and grubby. The switch functions correctly although it is rather stiff and would benefit from lubrication. Surface corrosion of the wiring retaining bracket. The type 27 (more commonly known as the Type 28 when 'mounted' on a wiring loom) was sometimes used with the E-series and G-type oxygen masks in addition to the second pattern microphone carrier masks. A good used example. Stock code O19640.