The Patek Philippe Annual Calendar Chronograph is crafted in a 40.5mm 18k rose gold case, round bezel and handsome black dial. It features annual calendar complication with day, date & month displayed in apertures across the top of the dial, a chronograph with both the 60-minute and 12-hour counters combined in the 6 o'clock position as an elegant monocounter. This timepiece is finished in a black alligator strap with an 18k rose gold deployant clasp.