Model: El Primero Reserve de MarcheReference: 03.0520.4021Date: Circa 2008Movement: 39-jewel Cal.4021 automaticDial: Silvered, engraved centre, applied polished Arabic numerals, outer minute divisions, exposed balance at 10, constant seconds at 9, 30 minute recording at 3, power reserve indication at 6, polished pointed baton hands, centre chronograph handCase: Brushed and polished round, exhibition back secured by 8 screws, crown flanked by twin buttonsStrap/Bracelet: Black Zenith rubberBuckle/Clasp: Signed double folding claspSigned: Case, dial & movementSize: 44mm