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. 90% of the original paint although rather dulled and grubby. The switch functions correctly. Some surface corrosion of the wiring retaining bracket and deterioration of the wiring loom grommet. 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 O19643.