Model 18 Randall knife (with compass), also known as 'Baker knife'.
Nowadays the knife is still sold with a naked handle, just like during the Vietnam war, and the buyer then wraps its handle with a cord at choice.
Randall designed some of his knives together with SOG personnel, and this is one of those knives that lately went into mass production exactly like Randall and the SOG had designed it.
He one used by SOG soldiers used to sport a black-coated blade.