The Vacheron Constantin Métiers d'Art Tribute To Great Explorer Naturalist 7500U/000R-B994 is a limited edition watch, with only 10 pieces in each of its 4 series. It celebrates the brave Explorer Naturalists who sailed on the Beagle in the 1830s, discovering new wonders of the world. The dial is a beautiful combination of hand-engraving and enameling, inspired by art, history, and culture. The self-winding 1120AT/1 caliber powers the satellite hour display on the bottom dial. As a stamp of excellence and reliability, the movement is adorned with the prestigious Hallmark of Geneva.