You must be logged in and verified to contact the designer.
This model illustrates a continuous morphing between the two knots known as the Perko Pair. The red knot is "Perko A", the knot known as 10_161 in the Rolfsen table. The purple knot is "Perko B", the Knot Formerly Known As 10_162. The remaining knots are snapshots of a continuous morphing from Perko A to Perko B that shows that they are, in fact, the same knot.