I have absolutely no information as to who this maker is and when they delivered scabbards. As mentioned above, they are associated with VIZ with the double markings. I have one WD marked scabbard in my reference collection that has the Victory Plastics marking (VP /9) under the throat plate and the VP logo (VP 40) on the scabbard body. I have others than do not have any marks other than those on the face of the throat. The combination of VIZ/WD may indicate that the contract was about the same time or shortly after the VIZ contract - that is, about 1968-69 at the peak of the Vietnam conflict.