This one is seemingly complete? Does come with the carrying case as well. It has a handwritten tag on the inside.
Based on the serial number it looks like its a 1961ish helmet? If you have any questions please feel free to contact me at any time!
This type of helmet was likely used by pilots in high-altitude aircraft, potentially during the Cold War era, offering life support and protection at extreme altitudes. It's a significant piece of aviation history, perfect for collectors of militaria or aviation memorabilia. Please examine photos carefully for condition and completeness.