Ulysse Nardin Classic Sonata Steel — Silverized Alarm GMT Dial | Ref. 673-05/90

Among the most technically demanding of all classical complications, the alarm wristwatch requires a manufacturer to engineer two independent energy trains — one for timekeeping, one for the acoustic mechanism — within the confined architecture of a wristwatch movement. The Classic Sonata is Ulysse Nardin's answer to this challenge, a 44 mm stainless steel instrument that combines the sonerie tradition of grand complications with the practical utility of a dual-time GMT module. Its silverized dial maintains the clean, uncluttered aesthetic of the Classico lineage while accommodating the indicators demanded by a multi-function movement: an alarm countdown counter, a 12- or 24-hour alarm mode selector, and a dual-time display that references the brand's marine-chronometer roots in its rigorous approach to global timekeeping.

Calibre UN-67 is a self-winding movement of considerable sophistication, housing the alarm function alongside full GMT capability — a combination that demands meticulous design to prevent any mechanical interference between the two systems. The alarm counter tracks elapsed time since the alarm was set, enabling the wearer to know precisely how much time remains before the chime triggers, while the 12h/24h selector allows the alarm to be programmed for either meridiem — critical for travellers crossing time zones who cannot afford to misread an AM/PM designation. Function simplification, an engineering priority at Ulysse Nardin, means the crown-and-pusher interface has been rationalised so that complex settings are made intuitively, without reference to a manual.

The 44 mm stainless steel case wears with quiet confidence, its proportions suited to both boardrooms and long-haul cabins. A sapphire crystal protects the silverized dial, whose restrained palette allows the complexity of the indication layout to register without visual clutter. A leather strap fitted with a folding buckle ensures the watch sits securely during travel, while water resistance to 30 metres provides adequate protection for everyday wear. For the collector who requires a single wristwatch to manage time zones, schedule alarms, and do so from within a case that invokes the centuries-old tradition of Swiss acoustic complications, the Classic Sonata represents a rare and functional masterwork.