Spir ala rips - IPP Edition

Spir ala rips IPP Edition was an exchange puzzle from Tomas Lindén at IPP37 (International Puzzle Party) hosted in Paris 2017.
The objective is to put the two pieces together flat on the table, so that the resulting shape can be bisected into two identical shapes (rotations and reflections are allowed).

Design by: Vesa Timonen
Made by: Tomas Lindén
Material: Curly Birch