The functions of this Calatrava watch from Patek Philippe are hours, minutes, seconds and date. These functions are cleverly set out on a opaline dial that uses elegant lancente hour and minute hands and polished index hour markers to show time. The dial also features a central seconds hand, a rectangular date display at 3 o'clock, and a Patek Philippe logo below 12 o'clock. The watch features a comfortable and durable strap made of black crocodile leather and a round case made of 18K white gold.