Grecian Computer - brainteaser puzzle

In the summer of 1901, a mysterious contraption was discovered deep under water in a shipwreck off Point Glyphadia, on the Greek island of Antikythera. Since its discovery, the “Antikythera mechanism” has often been referred to as the world’s first known analogue computer. Using technology that was lost to antiquity until the 14th century, this baffling mechanism was allegedly used to predict astronomical positions and eclipses, as well as the 4-year cycle of the Olympic games. Inspired by the unparalleled true genius of ancient Grecian astronomers, this puzzle challenges you to turn the dials until all 12 columns add up to 42. Difficulty: 5/5 TRUE GENIUS COLLECTION A NEW TWIST ON THE CLASSICS The True Genius line brings together brainteaser puzzles and links each design with an ancient civilization including China, Aztec, Rome, Greece and Egypt.  The puzzles are finished in an antique style to look as though they might actually be artifacts from long ago. The True Genius line offers a wide variety of price points, difficulty levels and solve types - filling in the gaps of any store's puzzle section or standing alone as a comprehensive collection of brainteasers.