In the 8 Jours collection, technique, passion and tradition come together to give life to mechanical hand-wound watches that maintain their autonomy for 8 days. On the dial there is an indicator with a patented operating device, whose hand displays the running time and reminds the user how much longer the watch will keep time. The innovation of Eberhard & Co. is a special patented winding device consisting of two overlapping springs, which together measure more than one and a half metres in length.