well there is the old 4 blade utility folder with metal scales adopted after world war 2 (end of world war 2, in that time frame) made by camillus, imperial, and other cutlerys. Theres the electricians knife with black plastic handles, one spear blade, one screwdriver combination wire stripper, made by camillus and others. There were also other folders, such as the small colonial three blade stockman with plastic grips, which go in the survival kits attached to the ba-18 survivial chutes (I know this as I use to work in survival equipment in the Af for 8 yrs, until getting out for disability from health problems from desert shield/storm). there are the leahtermans, and some of the gerbers (pliers) that were issued out also. There are the old pockets knives made by numerous cutlerys, such as camillus. Many of these resemble stockmans and have bone, or plastic scales. The only way to know these a=for sure would be that would be stamped US GOVERMENT, or US GOVT or US, ect.
One thing you have to understand is that the military will list knives that are approved in the federal catalog and then all that has to be done is them to be ordered for a purpose, that can be justified and its done. An example would be the f/u knife, better known as the Kabar (generically anymore, because only ontario holds the contract for these, since the early 80's) its listed in the federal catalog with a federal stock no., and only has to be ordered (as long as its justified of course). when an item is approved its listed in the federal catalog for supply purposes. Theres much info about this, one you can find in the catalog is some of the automatic benchmades.
I would suggest you post this on levines forum for better info.