This a original Factory White HGU 26/P   Helmet size Large with dual visor clear and dark used probably at Belgian Air Force

Original HGU 26/P Quarter Helmet with PRU-36/P Dual Visor Assembly and MBU 5/P Mask

Original HGU 55/P Flight Helmet Size Medium with gray MBU 12/P mask with green hose

This is a orignal HGU 2AP/G flight helmet came from an retired German Airforce Pilot

Original US Army Gentex SPH 4 B Helicopter Flight Helmet Size X-Large

Original USAF P-4A Flight Helmet Date 1953 with A 14 Mask,

Original HGU 26/P Helmet with PRU 36 double visor housing

Original German Phantom F 4 Fighter Pilot Helmet HGU 55/G Flight Helmet with MBU 5/P mask and „WEA“

This is a original HGU 2AP/G flight helmet came from an retired German Airforce Pilot

Original Flight Deck Helmet , HGU-24/P Size 7 – 1/4