I have seen this model on a youtube video, but the guy who posted the video stated that he did not know or cannot find the name of the person who designed this model,.
So I had a feeling that this model is traditional.
Oh well, oh crap.
I initially thought it was Tomoko Fuse, since a photo in Go Origami!
had a photo of an icosahedron with the same pattern, and Fuse’s name is
stated as the designer.
Then, I downloaded a copy of the book “Unit Origami Essence” a. b.
Tomoko Fuse (Go Origami! stated that the diagrams of the icosahedron is
in thie book) but when I saw the the module for the icosahedron in the
book, it is COMPLETELY different from the module of the Icosahedron
featured here today.
I was like, “whuuut?”
The model requires 30 pieces of rectangular paper. It’s really fun to make, though.
The link to the instructional video: