The original SCUBA/DEMO is the rarest of the Special Forces SOG® knives in existence. In fact, only one original is known to exist today. Originally, 39 were made and 38 of these were delivered to the Naval Advisory Detachment for missions on the North Vietnamese coastline. They were issued to OPLAN 34 ALPHA in 1964 at which time 36 were lost in operations and two were never seen again.  Using current manufacturing techniques, SOG® has created a spectacular reproduction of this ultra rare knife, with a modern twist.