Good luck finding this one out. I recently bought a set of Alaskan Guide binos and all they would say is that they were made by a major Japanese manufacturer. I am assuming Nikon based on that comment and also on the particular texture of the image but could be totally wrong.

I also searched the net on a few occasions and found a few comments here and there in various optics forums which led me to believe it was either Nikon or Fujinon.