This listing is for 1 wooden perpetual calendar. A circular spinning perpetual calendar. This hangs from the wall like a picture would on a nail or a screw. The rings turn manually so there are no small parts to break. The outter most ring is 300 mm in diameter so this is a substantial size. It’s made with mahogany plywood for the rings, kwila and macrocarpa for the dial window. The carving is Celtic Tree of Life Symbolism. The symbolism of the Celtic tree of life is ultimately about the forces of nature combining to create balance and harmony. The branches reach for the sky, the roots reach down into the ground. … The Celts believed the tree of life was a symbol of longevity, wisdom and strength.