Horologically Unique brings Robert Cart's Chronoscope to the wrist in a $3,850 watch

Horologically Unique, the young independent brand from Singapore, has unveiled its second watch. The HU-02 reproduces the wandering jump-hour display that Robert Cart patented as the Chronoscope in the 1920s, a complication he built into pocket watches for Breguet, Gubelin and Vacheron Constantin.

The format marks a clear step up from the brand's first project. That debut, the HU-01, was a restrained take on the Calatrava reference 96 blueprint dress watch. The HU-02 is more ambitious on both fronts, mechanical and design, and it starts at USD 3,850.

Robert Cart, born in 1871, founded his manufacture at Le Locle in 1919 or 1920. Robert Cart S.A. became known for thin and complicated watches: repeaters, chronographs, perpetual calendars and ultra-thin movements, made under his own name and for other houses.

The Chronoscope was his signature. In it, the hour is in a small window while the entire dial rotates, so the hours travel slowly across the face as the minutes continue moving normally. As the arrow passes from the 59th to the 60th minute, the hour disc jumps.

The name draws on the Greek chronos for time and scope for range or sector. Cart paired the jumping hour with a wandering minutes indication, and the display suited the bold geometric cases and decorative dials of the Art Deco period. Breguet, Gubelin and Vacheron all commissioned such pieces.

For the HU-02, Horologically Unique looked specifically at a Robert Cart for Breguet pocket watch, one defined by a sharp, ultra-thin case, geometric lines and an arrow on the dial. The point was to keep that sharpness and elegance while shrinking the display to the wrist.

The approach has precedent. Cart himself produced wristwatches for Breguet in the late 1920s, and Vacheron used a slightly different mechanism for its Heures Sautantes in the 1990s. None of those are widely available, nor are they financially accessible today.

Vincent Calabrese worked from an identical concept for his Baladin, a design recently reused in the M.A.D.3.

The case and the two dials

Horologically Unique calls the case Disco Volante-style. It is lug-less, with the strap integrated cleanly through the caseback, and it measures 38mm in diameter. Total thickness is 11.5mm with the domed sapphire crystal, or 10.1mm without it.

The bezel is stepped and the crown is concealed, so that with the strap removed the watch could almost pass as a small desk clock. The design is minimal without being overly modern, and it closes the gap between a pocket-watch display and a wrist format.

Two variants are offered. The Classic is housed in naval brass, entirely polished and coated with a protective layer, which gives its gold-like surface a slight patina in photographs. It pairs the brass with a smooth cream dial and a sand-coloured leather strap.

The second edition is the bolder, more textured Silver Speciale. In polished steel, it carries a grained silver-toned dial and a brushed minute track, matched to a taupe leather strap. On both, the Art Deco language is reproduced faithfully from the Breguet and Cart originals.

That language shows in the geometric hour window, the sharp font of the minute track and, above all, an arrow-shaped guilloche motif covering most of the dial. It is a pattern that would not have looked out of place in the Chrysler Building lobby in the 1930s.

Mechanically, the HU-02 is built on a tried ETA 2824-2, heavily modified to carry a wandering module on top. The modification explains the relative thickness of the case and the shortened reserve of 32 hours, and it is the trade that makes a Cart display genuinely obtainable.

Sales run through the brand's website in a limited production period, with the allocation window still to be confirmed. The Classic is priced at USD 3,850 and the Silver Speciale at USD 3,980. The founder began as an enthusiast selling part of his collection on Instagram before turning to making watches his own way.

For context, Horologically Unique chose naval brass for the Classic deliberately, and the coated finish is what lends the case its softened gold tone in the release images. The Silver Speciale's grained dial and brushed track distinguish it just as clearly from the smooth cream of the brass version.

The result is a wristwatch that reproduces Cart's famous wandering display rather than merely borrowing its styling. The rotating dial, the jumping hour in its window, and the sharp Art Deco case all survive the transition from pocket to wrist at a price no earlier attempt approached.