Solid Pine. No plywood. The front and back panels are glue ups of random width boards. The sides are a straight cut of 1×12. First panel glue up without pocket hole screws and I love it! Also, I finally got SketchUp working in Linux so this one went together quite well :) Side note: the chest in the background was finished the same way with amber shellac. It shows the color change after a couple years. As you can see from the file the plan changed a bit when I was in the shop. Overall dimensions are there. Video shows some changes as well.
EDIT: This project was completed in the beginning of 2013. I have since lost the diagrams for it but I do have a SketchUp file that you can download and use with the free version of SketchUp. Click here for the file.