The bulk of Busse knives are "no logo" versions, especially the older versions.
A lot of Jerry's output goes to buyers who prefer "sterile" equipment, and essentially all of the products, up until maybe last year were that way.
Some of the more current production ones (late 2000 on) have the Busse logo on the left side of the blade.
These are not lower in value by any means. In fact, some people prefer the sterile versions in order to maintain continuity in their collection.