For those interested in a good way to hang a wall sign without putting visible screws through the face, here's a method I use often. This is how this sign was put up. It took a couple of minutes to screw the hanger cleat to the wall. Put one screw in either end, set your level on top of the cleat, raise or lower till level, then finish screwing to the wall. Measure how high up the center cleat should be on top and screw that to the wall. Hang sign on the cleat and secure at the top with one recessed screw and you're done. The sign cannot move at all because of how the sign and wall cleats miters lock in together. This is basically a simple Z clip system that I make up with scrap materials I have around the shop.
I know many of you already use this method but for those who don't, consider it on your next install. Makes for a fast and professional looking install. I hope I explained it well enough.