Look carefully at this puzzle and it doesn’t appear possible to make a joint like that as it has dovetails on ALL 4 SIDES! The object is to take it apart. The earliest known reference to this puzzle is the May 1902 edition of  “the Woodworker” magazine. A clever and classic puzzle documented in Jerry Slocums first puzzle book, "Puzzles Old and New."

Dimensions: 1.6" x 3.8" x 1.6"
Difficulty level: 3 (out of 6)
Suggested age: 10+