Bill Eccles on the fine details found in iPod nano’s home page:

Worth noting is that the second hand is swept (i.e., it moves in less-than-one-second increments—5Hz, I think—just like a real mechanical movement watch) and that the minute and hour hands’ motions emulate that of a geartrain. That is, they, too, move with each tiny tick of the second hand, just as a real watch does. The motion is beautifully imperceptible, just like a real watch. It’s stunning.

These Nano Guys Got It Right