The main, lower, dial is the oldest part of the clock, dating from 1484. The fleur-de-lys 'hand' indicates the time (and the position of the sun in the sky) on a 24-hour analogue dial. The numbering consists of two sets of I-XII Roman numerals. The silver ball and inner dial shows both the age of the moon and its phase (using a rotating black shield to indicate the moon's phase). The upper dial, added in 1760, shows the minutes.