Cal. 2874 nickel-finished lever movement 38 jewels minute repeating on two polished steel hammers onto two gongs the blue brushed dial with applied white gold baton and Arabic numerals eccentric 30 minutes register to 3 oclock the three-armed one minute tourbillon carriage with monometallic balance combined with constants seconds exposed through a glazed aperture in large circular satined case with polished bezel downturned lugs glazed display snap on back repeating slide and two round chronograph buttons in the band 18K white gold Audemars Piguet deployant clasp depicting the letters AP case dial and movement signed