The Ulysse Nardin El Toro / Black Toro is a remarkable example of horological excellence, combining a perpetual calendar with a dual time system unique to the brand. Launched in 2013, this model features a robust 43mm case in 18k rose gold, reflecting a bold statement of luxury. The watch is powered by the caliber UN-32 automatic movement, offering a 48-hour power reserve. Its compelling black dial showcases the complex functions of this timepiece, including hours, minutes, small seconds, and a GMT indicator alongside a perpetual calendar, set against a contrasting black rubber strap for comfort and durability.