I had this design in mind for a long time (adaptation of free-standing rack), but only got to do it now, and only because I am trying to organize my shop, and because I have a good number of knives around and no good storage solution, this was just the right incentive.
This is a prototype rack, made to get familiar with a process and to decide what changes to make for subsequent ones, so I wasn't paying much attention to quality of material or level of finish. I will make a couple more of these in poplar and then attempt one in walnut. The one in walnut will be along the line of a production item.
The construction is mortise and tenon - no nails or screws used. Rack is fastened to the wall with two or four screws (will probably be two).
It's A-shape, though one can't tell it from the pictures. Next one I will make the angle a little more pronounced.
I plan to offer this design rack as a part of a few products that will be offered alongside knives in the near future.