I made this puzzle also long time ago. If you turn this photo (or this puzzle) upside down, you will see this puzzle is exactly same with African ball puzzle. The aim of this puzzle is transferring the ring to the opposite side. This puzzle is very nice for making as a coffee table puzzle. It looks nice, very easy to make and difficult to solve for your visitors and friends. My puzzle dimensions are here,
If you are planing to make one as a coffee table puzzle you can make a little bigger. I made wooden ring from a wooden dough roller. You can cut it with a scroll saw or you can make something square etc. Rope arrangement is visible from photo. Two end of the rope are fixed to base.