The new Chronometry Collection from Ulysse Nardin looks back to the brand’s history as it turns 175, and a lot of that history is bound up in ship’s chronometers. But UN has also grown and evolved in more recent years. The company was a real pioneer in the use of silicon, and its UN-118 movement, with silicon hairspring and escape wheel and anchor in Diamonsil, are testament to this more recent past. In 2011, Ulysse Nardin bought dialmaker Donzé Cadrans, bringing old-fashioned in-house enamel dial-making into its quiver, and making fine blue enamel dials like the one in this 175-piece limited edition possible.