In my local computer shop I found that these two-tone IBM keyboards are OEMed for IBM by "Micro Innovations." They made a few different keyboards with blue Enter keys and the space-saving pageup/down layout, a folding keyboard, and at least one wireless keyboard under the "IBM" brand label used under license.
Best thing I can say about them is that they're two-tone and have a great texture.
Much like AT&T Trimline phones at K-Mart are OEMed by "Advanced American Telephones."