Combining 21st-century circuitry that receives signals from the official U.S. atomic clock with the historical ''drop octagon'' design found in 19th-century schoolhouses, this timepiece automatically maintains permanent accuracy to the second. Self-adjusting for daylight saving time, leap seconds, and other official time changes, it has a beautiful cherry-finished alder case and sets up with the touch of a button. Two AA batteries, not included. 13 1/2''W x 21''H x 3 3/4''D.