Quadlock1

Designed 1992 and made by Jerry McFarland, purchased from cubicdissection.com 2008.
(Walnut, Mahogany, Maple, 19 pieces, 3.5" by 2.6" high, 7/8 inch square sticks)

Disassembly involves manipulating the central 4 pieces like opening a lock.
Here is the diagram of the pieces from the solution sold with the puzzle and photos of removing three pieces:



Further Reading
Solution that was sold with the puzzle.