Strange German electric desk clock with radio control device-radio synchronised,patented ca. 1938 year,wound by the key and electric power 110-220 V,also.Seems to be complete.In strong working order,seems to be accurate,but cleaning and timing will probably be necessary.Dimensions:90mm at the top/120mm at the bottom/125mm high/65mm thick.In German it is called Synchronuhr,I wound it by means of the key from my other German clock but I don't have an original key.