The 60-foot-diameter clock face is nearly twice as large as the one in London’s Elizabeth Tower which houses Big Ben, and was the largest single-face clock in the world when it was first erected on Mount Washington’s hillside in 1933, advertising Coca-Cola. The hour hand is 25 feet long and the minute hand is 35 feet long. Incredibly, the 2,390 pound mechanism used to move the hands is controlled by a timing mechanism that only weighs eight ounces.