In Place of a battery it really is powered by a little photo voltaic panel over the watch confront (the 'Eco Travel') and thanks to 'Atomic Timekeeping' it can assert to generally be the 'most correct watch on the globe'. They produced the 1st German pilot watches, which were DIN-Accredited. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/