4/3/19 - This is an original Vietnam era pilot's knife for use of breaking the cockpit glass / canopy shield in case of a crash landing. The knife is heavy, and locked in its' holder with a locking pin. This pin is removed to expose the blade. There are no maker stamps or dates on the blade, but research tells us this is Vietnam era. There is some rust, as shown in photos, on the base of the blade, and some of the orange paint is chipped, but overall this piece is in great condition. All original, guaranteed.