Boxed Six Board Burr - Frans de Vreugd - 2003 by Bits and Pieces

This puzzle was used by Frans at IPP 24 and features 6 pieces plus a frame with a level move count of 5.2.4.

This particular puzzle was nicely crafted by Bits and Pieces (using shoulder joints on every piece) back when they offered this puzzle in their catalog.

For some reason Bits and Pieces decided to call this puzzle ‘Mysterious Panels’..?