craftsmanship. Offered in steel, 18K gold, or platinum, the various models of the Ulysse Nardin San Marco watch collection demonstrate the rare arts of enamelling, or fine hand applied guilloche engraving. Ulysse Nardin has chosen to revive the ancient process of cloisonne enamelling, and the San Marco collection is home to a very select group of limited editions which depict famous naval scenes, ships, or renowned historical architecture, all accomplished through this extraordinary technique which involves the meticulous process of filling delicate patterns outlined by gold wire with vitreous enamels which are then repeatedly kiln fired layer by layer to achieve the proper consistency and color. This painstaking process in which the slightest error can destroy the entire work is practiced by only a handful of masters in the world today, and Ulysse Nardin watchmakers specialize in this process, making these San Marco watches high works of art in haute horologie.