The Cannon Puzzle is inspired by classic mechanical puzzles and is a favorite among collectors for its vintage design and clever mechanics. The designer, though not widely credited by name, drew inspiration from old-fashioned cannon mechanisms used in history. This puzzle falls into the category of sequential discovery, where solving requires multiple steps, each revealing more about the internal structure. The puzzle's appeal lies in its sturdy, metal construction and the elegance of its solution. It's moderately difficult, requiring creative thinking and a keen sense of mechanical movement.