Patsy, It is a variation of the Sonobe unit. In this link it is version 2a.
https://www.amherst.edu/media/view/290032/original/oragami.pdf Kathy On Jan 1, 2021, at 3:06 PM, patsy monk <[email protected]> wrote: Thanks for your question.... It is a 2 piece model 😉 patsy <image.jpg>
