The Half-Hour Puzzle (STC-29)

Designer: Stewart T. Coffin
Puzzle type/category: Cubic dissection / Assembly
Difficulty level: ?
Material: African Padauk and Canarywood, with a tray made from Yellowheart.

I discovered this puzzle in Brian Menold's book, WOODEN PUZZLES. I had fun naming the various symmetrical configurations in which these pieces can be assembled.