6/5/17 - This is a set of three original WW2 era production US Switchblade knives. These were used by the air force for pilots and paratroopers who needed to cut their parachute chords quickly and effectively. This set of three knives makes an instant collection, as all three blades are different makers! Each blade is pristine and has excellent action on the blade. All of the internal springs are tight and fully functional. The safeties are all fully functional as well. Guaranteed original and authentic !