Der Doppelchronograph, Ref:3713, Case No.2638831, Circa 1990s
29-jewel Cal.79230 rhodium-plated movement, straight line lever escapement, mono-metallic balance, shock absorber, self-compensating flat balance spring, black dial with Arabic numerals, outer silver minute and 1/5th second track with Arabic five minute markers, luminous steel baton hands, subsidiary dials for running seconds, 30 minute and 12 hour recording, apertures for the days of the week and the date, brushed and polished steel case with screw down back and crown, soft iron core cap to provide anti-magnetic shield, protected push-buttons, fitted IWC leather strap with steel IWC buckle, together with presentation box, outer card and instruction booklets, case, dial and movement signed
42mm.