This was Oskar van Deventer`s exchange puzzle at the IPP Berlin 2011.
Puzzle Master is one of the exclusive seller of these puzzles. There is a limited supply as no more will be made.
Spiral Burr is a six-piece burr of interlocking spirals. Next to sliding and rotation, spiraling is the third fundamental way of turning pieces in an interlocking puzzle. The spirals are notched. The object is putting the puzzle back together after turning it apart.