Worlds largest cuckoo clock

The largest functioning cuckoo clock.

Musical cuckoo clocks frequently have other automatisms which move when the music box plays. Today's cuckoo clocks are almost always weight driven, a very few are spring driven. The weights are made of cast iron in a pine cone shape and the "cuc-koo" sound is created by two tiny gedackt (pipes) in the clock, with bellows attached to their bottoms. The clock's mechanism activates the bellows to send a puff of air into each pipe alternately when the clock strikes.