Interlocking - Altekruse

Altekruse (Stewart Coffin)
Larger Photograph (82.7K)

Altekruse (Tom Lensch)
Altekruse Puzzle Piece
Altekruse Puzzle Piece
Designer:W. Altekruse
Craftsman:Stewart Coffin (1st)
Tom Lensch (2nd)
Material:Zebrawood, Paldau & Padauk (1st)
Mahogany (2nd)
Pieces:12, 14, 36 or 38

Patented by W. Altekruse in 1890. All of the pieces are the same. Stewart Coffin found that not only can it be assembled with twelve pieces, but fourteen as well. A larger version with thirty-six or thirty-eight pieces is also possible. There are three solutions, all of which are unusually different from other burrs.
More information in The Puzzling World of Polyhedral Dissections