US USAF SPH-48 Helmet Assembly Used Softcover Reference Book

The US USAF SPH-48 Helmet Assembly Used Softcover Reference Book provides detailed documentation and analysis of the SPH-48 helmet assembly issued to the United States Air Force. This softcover publication covers the technical specifications, construction features, and operational history of the SPH-48 helmet, a model primarily used by aircrew in military aviation environments. The book includes information on the helmet’s design evolution, components, and typical markings, along with guidance for identifying various production variants. It also addresses the helmet’s use in conjunction with other flight gear and its role within operational contexts from the late 20th century onward. Photographs, diagrams, and reference tables supplement the text, offering visual support and quick-reference data for researchers and collectors. This reference is intended for individuals seeking factual, illustrated information on the SPH-48 helmet assembly in military use, sourced from documentation, period images, and existing examples within collections.  Total of approx 10 pages.