There were many types of knifes carried by SF in Vietnam. I carried a Randall that was given to my by Captain Joe Tucker when he came back to Okinawa from Vietnam. I passed that on to my son during the Gulf Wars and Operation Iraqi Freedom. He passed it to another warrior so it would always be in use by a soldier.
MACSOG Recon had “Recon knives” that were “sterile” in that it did not say US or Made in America. or made anywhere. There were no markings on that knife. It was used by some and later began being used as a presentation item.
Then there was the demo (demolition) knife. I don’t remember carrying one in Vietnam but that was one thing the stereo-typical “Green Beret” had to carry. I think only engineers were supposed to carry it but somehow most of us did. It was stamped US and was carried in a sheath made from Parachute rigging material. The sheath also had some elastic so you could carry a US Government ball-point pen.The piece that looks like a leather punch was for putting a hole in C4 (plastic explosive) to insert the blasting cap. You would never try to push the blasting cap into the C4 without the hole – if you did, there would not be a second time.
The Yarborough Knife was specifically designed for Special Forces. It was named after Lieutenant General William Pelham Yarborough (May 12, 1912 – December 6, 2005) a United States Army officer and a 1936 graduate of West Point. Yarborough designed the US Army’s parachutist badge, paratrooper or ‘jump’ boots, and the airborne jump uniform. He is known as the ‘Father of the Modern Green Berets.’ As of August 23, 2004, it is presented to graduates of the Special Forces Qualification Course. The serial numbered knife can also be purchased by vetted active duty and former SF. A master log, bearing the serial numbers and recipient names is maintained by the US Army John F. Kennedy Special Warfare Center and School. The issue of every Yarborough Knife is subject to USASOC approval.
The blade is 7″ long and it is extremely sharp. The handle is made of extremely durable, textured, black canvas Micarta. The knife was designed by renowned knife maker and designer Bill Harsey, with function and manufacturing input from Chris Reeve. Yarborough knifes are made in Boise, Idaho by Chris Reeve.