Rubik's clock
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Rubik's Clock; usally only Clock is a round, 2-sided puzzle that consists of 18 mini "clocks", 9 on each side, arranged in 3x3 squares. The hands on the clock can be manipulated by turning small wheels on the side of the puzzle and by pressing four buttons on the face. The object is to get them all pointing in the 12:00 position. The only commonly used type of Clock is the Rubik's brand. Since that company no longer produces this puzzle, to get one it is usually necessary to use eBay to find one. Fortunately this is a very common and inexpensive puzzle.
