This cuckoo clock has an exclusive life-like wooden handpainted cuckoo. With certificate of authenticity from the Black Forest Clock Association (VdS). It has a mechanical extreme long-life rack strike movement. It allows turning the hands left and right without endangering the mechanics of the movement. The 1 day running time movement need to be wind up every day, that means you pull on the chains until the weights are up. The size refers only to the clock, without pendulum and weights.