Ulysse Nardin Classic Hourstriker Platinum — Black Grand Feu Enamel Dial | Ref. 6109-131-E2/OIL

Platinum is the metal of ultimate horological ambition — denser than gold, more resistant to oxidation than any other noble metal, and carrying a weight on the wrist that is at once a physical reminder and a symbolic one of the investment being made. Ulysse Nardin's Classic Hourstriker in 43mm platinum combines this exceptional case material with a genuine black grand feu enamel dial and the acoustic sophistication of Caliber UN-610 — a self-winding movement with hourstriker complication — to produce a watch that occupies the rarest register of Swiss watchmaking. At $120,870, this is a piece for the collector who has already surveyed the landscape and arrived at a precise destination.

Calibrer UN-610 is the horological justification for the platinum case and enamel dial: a self-winding movement whose hourstriker complication delivers a mechanically generated acoustic time signal on each hour, sounding via a hammer-and-gong architecture whose acoustic tuning represents some of the most demanding engineering in the watchmaker's repertoire. The relationship between hammer geometry, gong material, gong path length, and case acoustic resonance determines the quality of the strike — and Ulysse Nardin's experience with striking complications, running from the Classic Sonata through the Royal Blue Tourbillon and beyond, means that the hourstriker's voice is the product of deep institutional knowledge rather than casual assembly. The leather strap with folding buckle provides the appropriate wrist presentation for a grand complication in platinum.

The black grand feu enamel dial is among the rarest and most demanding of all dial surfaces to produce: powdered glass fired repeatedly at temperatures above 800 degrees Celsius, each firing building layers of depth that no photographic reproduction can fully convey. Black enamel is additionally challenging because the deep pigmentation introduced during firing must remain absolutely uniform — any variation becomes immediately apparent against the mirror polish of the finished surface. The sapphire crystal maintains full visual access to this extraordinary surface across decades of ownership. Water resistance to 30 metres is appropriate for a grand complication piece of this nature. The Classic Hourstriker in platinum is, simply, one of the most significant watches Ulysse Nardin produces.