Bussing-Nag, anyone heard of this brand?

[bryanoshaughnessy]

I've purchased a knife that the seller suggested is a Luftwaffe pocketknife. Has one sheepsfoot blade, and one utility blade featuring screwdriver at tip, sharp saw serrations on the edge. Both fold to same side of knife, riding a common spring. Handles are cast metal, one side is a flying eagle clutching a swastika; other has the same roughened surface as the first side, with typeset words: Bussing-Nag/Leipzig with letters RZM enclosed in a circle. Blades have no markings but are satin-polished, apparently stainless steel, though the term "rostfrei" is not imprinted anywhere. The pocketknife appears to have been carried for many years; the handles are pocket-worn but undamaged. The blades appear never to have been used. I believe that this knife is not as old as purported by the seller.
I paid less than you'd think for a well-made, substantial pocketknife, so I won't be disappointed if there is no quality to the nazi claim. First, I wonder if any readers have information to illuminate my knife, and, second, I suggest an authority write an article about pocketknives issued to soldiers of other countries. I have a book about American military-issued pocketknives (I think the author is Wayne Goddard), but I'm not aware of books about other countries. I think this could be an interesting collection topic, expanding collector interest to trade with other knife collectors around the world. Reading a book, or at least an article, about such knives would give me a background upon which to start an intelligent search for foreign military pocketknives.
Thank you for whatever information you can provide.
Best regards, Bryan O'Shaughnessy, Cary, Illinois