Interlocking - Diagonal Cube

Diagonal Cube - (Stewart Coffin)
Larger Photograph (60.8K)

Diagonal Cube - (Stewart Coffin)
Larger Photograph (60.9K)

Diagonal Cube - (Tom Lensch)
Larger Photograph (82.6K)

Diagonal Cube - Partially Assembled (Tom Lensch)
Diagonal Cube - (Bart Buie)
Larger Photograph (99.2K)

Diagonal Cube - (Lee Krasnow)
Larger Photograph (89.3K)
Designer:Stewart Coffin
Craftsman:Stewart Coffin (1st & 2nd)
Tom Lensch (3rd & 4th)
Bart Buie (5th)
Lee Krasnow (6th)
Material:Cherry & Honduras Rosewood (1st)
Cherry & Brazilian Rosewood (2nd)
Cardinal & Pau Marfim (3rd)
Zebrawood & Padauk (5th)
Bubinga & Gaboon Ebony)

Unbelievably, a variation of the diagonal burr. The 4th photograph shows the puzzle partially disassembled. Like all of the diagonal burr family, it first comes apart in halves. Stewart made 20 from 1971 to 1985. Number 58 in his numbering system.
More information in The Puzzling World of Polyhedral Dissections