 In 1550 there were accusations that some of the gears had been stolen and sold.In 1752 Bartolomeo Ferracina started work on replacing the clock, having successfully tendered for the job in public competition.He installed a new movement, removed the planetary dials, installed a rotating moon ball to show the phase, and changed the numbering of the clock face from the old Italian style (I to XXIIII in Roman numerals) to the 12-hour style, using two sets of Arabic numerals, with 12 at the top and bottom of the dial.