Artisan work. Created with the same tools and technics used in the XV century. Ardavin´s Medieval Clocks never existed. The models are created based on designs, materials, styles and mechanical properties used by the real clockmakers during the XV century. Wood, iron, brass and a lot of handmade tools are used. You can find more info visiting [Ardavin´s Web](https://ardavin.net/historia-del-reloj/como-funciona-un-reloj-medieval/) (only spanish) or can see the real model in [this video]( https://www.youtube.com/watch?v=Gdbv2D1G_j4). Also, this [animation]( https://www.youtube.com/watch?v=BoeP0adbDKg) contains a very useful explanation of "how it works"