John Harrison’s H4 timepiece was a revolution. The English carpenter and clockmaker unravelled the riddle of longitude, allowing for sailors to accurately calculate their position at sea and, thus, to confidently chart the seven seas. Today, the modern traveller seeks more than mere functionality— they desire sophistication and craftsmanship. These dual time watches stand testament to horological excellence, while maintaining artisanal heritage that has gone on to define luxury watchmaking.
ARMIN STROM
ARMIN STROM Dual Time GMT Resonance, Manufacture Edition Black This timepiece runs two independent movements and synchronises them using physics. The secret lies in twin balance wheels at 12 o’clock, connected by Armin Strom’s patented resonance clutch spring. Two oscillators naturally sync up, cancelling out individual error and delivering chronometric precision. This new Black Edition houses all that complexity in a 39 mm stainless steel 9.05 mm thick case. It has a black main-plate, black grenage-finished dials, and black day/night indicators hand-engraved with sun and moon motifs. The dual crown set-up allows each time zone to be set independently. The calibre ARF22 movement operates both sides at 3.5Hz with 42-hour power reserve per barrel. With only 50 pieces, its sapphire case-back, symmetrical bridges reveal Côtes de Genève decoration and anthracite openwork.
PANERAI
PANERAI Luminor Perpetual Calendar GMT Platinumtech This Italian statement piece is a 44 mm technical tour de force. Panerai’s proprietary Platinumtech case material is 95 per cent pure platinum engineered to be 40 per cent harder than standard platinum. Everything adjusts via the crown. Day, date, month, and leap year cycle run smoothly through 2399, while the central GMT hand and 24-hour day/night indicator handle dual time zones with typical Panerai craftsmanship. The transparent sapphire dial reveals the in-house P.4100 calibre working its magic, creating an almost X-ray effect that’s oddly beautiful. Applied indices glow with Super-LumiNova. At 50 metres water resistance, it’s hardly a dive watch, but this is a timepiece for boardrooms and first-class lounges, where horological gravitas matters more than depth ratings.
RESSENCE
RESSENCE Type 7 GMT With dual time zones showcased through orbital discs floating in oil, the watch’s trademark convex display houses four interlocking discs. The local time appears via a large orbiting pointer, while the GMT function uses an independently rotating 24-hour disc. Built around a 41 mm Grade 5 titanium case measuring 14 mm thick, the Type 7 marks the brand’s debut GMT function and first-ever titanium bracelet with deployant clasp featuring five adjustment positions. Its oil-filled chamber system, with separate compartments for the dial and movement connected by magnetic drive, makes the display appear to float weightlessly.
PARMIGIANI
PARMIGIANI Tonda PF GMT Rattrapante At 3Hz with 48 hours of power reserve, this elegant solution to dual time zones boasts restraint in design. Sans date window, AM/PM indication, and 24-hour hand, this watch has a rhodium-plated gold for local time, and 18k rose gold for home time. The PF501 calibre packs 215 components into a 4.9 mm movement, thanks to a 22k rose gold micro-rotor decorated with grain d’orge guilloché. A pusher at 8 o’clock advances the white gold local time hand in onehour increments, while the home time stays put. The 40 mm stainless steel case measures just 10.7 mm thick, with a reeded platinum bezel and integrated bracelet.
JAEGER-LECOULTRE
JAEGER-LECOULTRE Reverso Tribute Geographic The reverse side of this 18k pink gold case features a comprehensive world time display, with 24 major cities indicated around the perimeter. Cities like Paris, Tokyo, and New York are distinctly marked, accompanied by a rotating 24-hour disc that tracks global day and night cycles. The front dial with a chocolate sunburst finish plays beautifully against the warm pink gold case. Dauphine hands sweep over applied gold hour markers and a classic chemin de fer minute track. The new calibre 834 features manual winding, 4Hz beat rate, and 42-hour power reserve, plus a patented big date mechanism that adds practical functionality. Limited to 150 pieces, this masterpiece in craftsmanship represents the Reverso in its most logical evolution.
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