Modern Contemporary Mechanical Gear Wall Clock with Calendar Wheel (silver) This fantastic wall clock has many gears spinning quietly nonstop 24 hours a day. You can read the date and month on the 2 little wheels on the center and the time on the large 22 inches wheel. (Month wheel rotate manually once a month. Date and time rotate automatically.) All gears are made of plastic and the main unit is made of steel. Nice decoration at home or office. Dimension: 22