Handmade Vintage Wooden "Nova" Puzzle

I really like handmade wooden puzzles like this, which are just nice sculptural objects to have sitting around (I personally am reluctant to try to take them apart, even when there are solution instructions, as there are here, sweetly noting that this is a tricky one!) I believe this "Nova" puzzle is made of pine, which has been stained, and it is constructed of six identical interlocking parts.

Great condition. Approx 3 3/4" each side.