53. 53Y IWC. A stainless steel automatic calendar chronograph wristwatch IWC. A stainless steel wrist chronograph with date automatic movement Model: Portofino Reference: IW378302 Date: Purchased in December 2008 Movement: 25-jewel Cal.79320 automatic, adjusted to 5 positions, No.3025354 Dial: Sunburst silvered, applied gilt baton hour markers, black outer 1/5th second divisions, sunken engine-turned subsidiary dials at 6, 9, 12, for seconds, 30 minute and 12 hour recording, day and date aperture at 3, gilt leaf hands, centre chronograph hand Case: Brushed and polished round, back secured by 7 screws, crown flanked by twin pushers, No.3212525 Strap/Bracelet: IWC brown alligator leather Buckle/Clasp: Signed folding clasp Signed: Case, dial & movement Size: 41mm Accompaniments: Box, IWC Guarantee card dated 12/2008, Instructions manual, cloth