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 8 day running time movement need to be wind up once a week, that means you pull on the chains until the weights are up. The size refers only to the clock, without pendulum and weights.On our about me Site you will find more information about us. This item is in the category "Collectibles\Decorative Collectibles\Clocks\Cuckoo & Black Forest Clocks". The seller is "isdd-gmbh" and is located in this country: DE. This item can be shipped worldwide.