The main feature of this Ulysse Nardin watch is the Constant Ulysse Anchor Escapement, a constant-force escapement made entirely of silicon. Completing the prototype version presented in 2014, this device offers great chronometric precision and takes its place in a 60-second tourbillon visible through the opening at 6 o'clock on the grand feu enamel dial, surrounded by the power reserve display. The Manufacture calibre UN-178, a hand-wound mechanical movement, is housed inside a case in white or pink gold, both limited to 18 pieces. It is fitted with a leather strap with a pin buckle.
