The mechanical movements with which black forest cuckoo clocks are fitted have to be winded up once every 1 day or 8 days. Whenever the clock strikes a full hour, the beautifully crafted designer door will fly open and the self important cuckoo imperiously seated on a perch will busily call out the number of hours.

In addition to this, at every half hour gong, the cuckoo will peep out of its door and call out once to announce the half hour. The weights in the 8 day cuckoo clock are usually bulkier, bigger, heavier compared to the weights of 1 day cuckoo clocks. As you can well understand, these 8 day cuckoo clocks therefore also cost more than the 1 day cousins.