(1) - will also flatten and pop back
into shape, hence can also be called Pop-up
Silveroctahedron (1). Can be made from
many different parallelogram modules such as
Sonobe, Corner-pocket Sonobe and Letterbox
Modules / Paper shape / Folding
geometry: 2 sets of 2 mirror-image parallelogram
modules from squares using standard folding
Date: David Mitchell, 1989 and 2016.
On-line diagrams are available on the Devious Devices page of this site.