It is a complicated gadget with some game value. I love it though!
a single, stand-up target between the two ramps, it's hittable from either lower flipper, and even from the upper edge of the top left flipper. In regular play, the target lights one of the 7 5-million targets (their locations in a bit) - if all 7 are lit, the Clock Target scores a one-time 1OM "Clock Bonus", along with incredibly startling sound, flashing light, and cool animation. Additional Clock hits (that ball) with all 5M targets lit gives nothing but a "cuckoo" noise. In certain Door and Camera modes, the Clock Target is worth lots of points and more animations.
The Clock is located just behind the Piano shot, and it (usually) counts down scoring rounds and things; the Clock can move at varying speeds, and once it hits 12, that's the end of the round. The Clock is a genuine, analog clock with hour and minute hands; the minute hand crosses sensors every 15 (Clock) minutes, in order to calibrate itself (watch closely when the Clock winds itself back to 12, always in the easier direction; it overshoots 12 by a few minutes, then reverses and stops on the sensor). The sensors also cause display changes during Clock rounds, so watch the display if you so desire.
In attract mode the clock will also display the real time.