Globetrotter
Like a finely crafted atlas, the Globetrotter worldtimer collection represents our planet.
refined eminence
Historically, the Double Tourbillon is rooted in the two guiding principles of John Arnold’s legacy: absolute chronometry and the mastery of world time. In developing his marine chronometers, Arnold sought to create reliable and reproducible instruments, offering navigators a precise reference to their point of departure. By comparing this constant time with local solar noon, navigators could determine their position along the east–west axis — their longitude — a breakthrough that forever transformed navigation.
The collection
duality
The Double Tourbillon embodies horological duality at its most sublime. At 12 o’clock, the local time display unfolds with refined Roman numerals, while at 6 o’clock, a remote time indication appears in Arabic numerals—their hours and minutes moving in perfect yet independent synchrony. This sophisticated display architecture frames the tourbillons engaged in their mesmerising ballet, each oscillating with precision yet following its own temporal rhythm.
Natural Harmony
The Double Tourbillon elevates haute horlogerie aesthetics through its masterful use of white opal—an Arnold & Son signature. The off-centre hour dials, carved from this ethereal stone, transform light into a mesmerising play of iridescent blues and milky luminescence, echoing the organic beauty of gemstones or natural elements such as amber.
ACCOMPLISHMENT
Extreme finishing techniques illuminate the architecture of the Double Tourbillon movement. The bridges are adorned with radiating Côtes de Genève, the mainplate is pearlised, and the wheels display circular graining. Polished gold chatons punctuate the composition, underscoring the calibre A&S8513’s distinction and artisanal pedigree. Even its generously shaped, gracefully designed click spring — intended to prevent the barrels from unwinding uncontrollably — is executed as a work of refinement. Hand-chamfered edges, satin-brushed surfaces, and mirror-polished gold tourbillon bridges complete a striking three-dimensional tableau, where every detail reflects the highest codes of haute horlogerie.
watchmaking excellence
The Double Tourbillon embodies the full breadth of design, manufacturing, finishing and setting expertise within the Arnold & Son Manufacture. Its domed sapphire crystal accommodates the sculptural presence of the tourbillons, each secured by a three-dimensional, cantilevered skeleton bridge crafted in gold. These tourbillons mark the culmination of a dual gear train, powered by two independent barrels and regulated via two crowns. This enables the A&S8513 calibre to display a single time indication or two distinct time zones. One display may even be dedicated to timing an extended event. Unlike conventional travel watches, the Double Tourbillon can indicate time zones offset by 15, 30, or 45 minutes, ensuring true universality in its function.
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