I found these plans for a skeleton clock a year or so ago. They are free to download. He also makes them available in PDF files for those who want to print them, glue the paper to wood, and cut by hand.
My CNC work is almost all metal and the largest gear on this plan set is about 8" which is about my limit. I also had to re-engineer much of it as I want mechanical connections for everything - not glue. It's a tremendously rewarding project. I do some work on it now and then and about 1/2 way through. You will see a lot of machine screws being used on my clock that are not part of the original design. My clock is here: