With its cannonball weights to mark of the days of the week, the Jefferson-designed Great Clock in Monticello’s Entrance Hall is one of the house’s many ingenious features. This miniature version captures the clock’s distinctive style, from impressive pediment and gold-on-black face to working pendulum—but without the weights. 7 1/2"h x 6 3/4"w x 3"d. Quartz movement uses one AA battery.