C1980’s R.A.F. Aircrew ‘Bone Dome’ Helmet Mk 4A with ‘Halo’ Visor and Microphone. 21449:6. C1980’s R.A.F. Aircrew ‘Bone Dome’ Helmet Mk 4A with ‘Halo’ Visor and Microphone. 21449:6. Antiques & Militaria

Introduced during the early 1980s, the Mk 4 series is still used in 2018. This helmet is fitted with a Silec boom microphone which is used in the RAF exclusively by Chinook crew. The internal badge states; By Helmets Ltd. Stores reference 22c/1303989. Size medium/Broad The MK.4A flying helmet provided a high level of protection against impact shock, blast and noise, compatibility with a wide range of oxygen masks and ancillary equipment within a wide variety of aircraft whilst providing maximum comfort to the wearer. The shell is of single piece rigid construction moulded from hand laminated satin weave glass fibre impregnated with polyester resin. On the inside of the shell a shock absorbing, closed cell, expanded polystyrene moulding is fitted. The lining incorporates an adjustable webbing suspension harness, communications headset and soft foam backed leather padding. The helmet is fitted with a two-part nylon webbing chin strap and two injection moulded polycarbonate visors, the outer tinted for protection against glare. The 'inner' clear blast visor is fitted with an adjustable lock. The shell has the original white paint finish and is in very good condition. Internally the helmet is also good. It retains excellent gel filled ear capsules and avionics. Fitted with a short pigtail loom, NATO plug and oxygen mask hook nuts. Both visors are excellent. The avionics have not been tested . The price includes UK delivery. 21449:6.