The Zenith El Primero 410 Limited Edition ref. 03.2092.410/91.C496 of which only 500 pieces are available is without a doubt one of the most beautiful chronographs equipped with an annual calendar out there. But what makes this El Primero 410 better and greater than other chronographs, it's the fact that you not only have a vintage inspired timepiece with a fully integrated automatic 12-hour chronograph, but you also have the amazing complication of an annual calendar with moon-phases at a very reasonable price.