civilian defense or public service armband fragment, manufactured in the style of mid-20th century civil defense or state-level emergency organization identifiers.Break Down of the MarkingsD.C.: Stands for the District of Columbia (Washington, D.C.).HSP: Stands for Highway Safety Patrol or a dedicated Hospital auxiliary disaster response unit.ADC: Stands for Air Defense Control or Auxiliary Defense Corps, active components during World War II and the Cold War eras for local emergency management and civil defense.Visual Analysis of the ConstructionThe piece features a distinct screen-printed text layout on heavy cotton duck/twill fabric with cut raw edges, showing where it was unstitched or cut