“The earliest description of gears was written in the 4th century B.C. by Aristotle. He wrote that the “direction of rotation is reversed when one gear wheel drives another gear wheel.” In the 3rd century B.C., various Greek Inventors used gears in water wheels and clocks, and sketches of various types of gears of around this time were found in Leonardo da Vinci’s notebooks later on. For a long period after these discoveries, there were no major development concerning wheels until the 17th century, when the first attempts to provide constant velocity ratios (conjugate profiles) was recorded and there was mention of the utilization of the involute curve.”A set of gear cufflinks are more than just accessories; they are history and lifestyle around the cuffs. This premium set comes in an exquisite piano finish wooden box with velvet inlay.