Original U.S. Civil Defense, Law Enforcement and Security Guard Cap Badge Collection - 5 Items Vietnam The cap was lined with

The cap was lined with a gasket of sock or rubber and faced with lead foil

along with their name:

The most important marking however is marked on the end of the barrel:

on the rear face of the cylinder

Original U.S. Civil Defense, Law Enforcement and Security Guard Cap Badge Collection - 5 Items Vietnam The cap was lined withOriginal Items: Only One Lot of 5 Available. A badge is a device or accessory, often containing the insignia of an organization, which is presented or displayed to indicate some feat of service, a special accomplishment, a symbol of authority granted by taking an oath (e. g., police and fire), a sign of legitimate employment or student status, or as a simple means of identification. They are also used in advertising, publicity, and for branding