Designed by Oskar van Deventer, sold by Mefferts 2012.
(plastic, 3.25" high, each ede is 3.75";
plastic, 2.5" face to face;
yellow opposite orange,
blue opposite light blue,
light green opposite green,
white opposite gray,
pink opposite red,
purple opposite light purple)
These two puzzles are the same except for the stickers.
Rotations are limited to rotating a pair of parallel sides.
When rotating, the faces do not become flat again until you rotate all the way back to the start.
However, this does not prevent other rotations while the sides are not flat.
For example, here is rotating the right side a little,
then rotating the right side some more,
and then rotating the front side a few turns: