Zenith El Primero Grande Class Open Automatic wristwatch in perfect condition. Silver guilloche dial with chronograph functions, power reserve indicator, as well as an opening displaying the movement. Automatic movement; calibre 4021. 44mm case diameter. Sapphire crystal. Featured on an original black leather Zenith strap with original deployment buckle. Reference #: 03.0520.4021. Including the original box and user’s manual + service papers from 20/11/25
