Here are some photos of my knife bar. On the end towards camera in the last two pictures there is a seam hidden there, about 1/6th the way from the right side. The back of the piece is solid wood as well, with two registration holes that fit over the screws. The thick steel back baseplate is also awesome aesthetically. Mine is the teak wood version. Enjoy!
Talking of clever craftsmen and artisans who deserve accolade, also have a look at this excellent magnetic knife bar: simple, cheap and quite effective.
I have one and it does its job quite nicely (magnets choice and placement is awesome, as they will "auto-space" your knives and keep them vertical). http://shop.anniesarc.com/collections/products/magnetic