The back of the clock is formed by half-lapped 9mm huon pine strips. I made the rabbets which form the half-lap with a veritas small plow plane.
After sanding to 240 grit with the random orbit sander I took the time to insert my marker. A 35mm forsner bit and a little epoxy made easy work of that. (Easier then when the case is assembled.)
The strips are intentionally irregular sizes - intentional imperfections. It adds a charm to a simple modern style.
A little sneak peak. The clock face is now sanded and the plugs flush.