Description
• Twelve-piece puzzle forms an asymmetrical abstract cube.
• Unique interlocking design stands out among similar brainteasers.
• Name derives from the German term for “old cross” and dates to 1890.
• Original design created by its 19th-century inventor.
• Built as a level-two burr that needs two separate steps to release a piece.
• Serves as a tactile desk toy to refresh the mind.
• Doubles as an entertaining coffee-table conversation piece.
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