Reference Q905T480 combines a chronograph with a world-time display on the Polaris platform, which makes this Polaris Chronograph World Time clone the most complication-dense variant in the current lineup. The 42mm stainless steel case houses an automatic chronograph movement paired with a 24-city world-time ring, covering timezone tracking and elapsed-time measurement in a single package. It is a considerable step up from the standard Polaris date models and even the standalone chronographs, layering two distinct complications into one dial without increasing the case diameter beyond the 42mm shared across the range.

Case & Movement Specs

• Case diameter: 42mm
• Case material: stainless steel with polished and brushed finishing
• Dial: blue, multi-layer, with chronograph subdials, a white 24-hour scale and a 24-city ring at the perimeter
• Crystal: sapphire with anti-reflective coating
• Bezel: fixed; the city ring is driven by the second crown at 10 o’clock
• Movement: clone Cal. 752A, automatic, 28,800 vph
• Functions: hours, minutes, central chronograph seconds, 30-minute counter at 3, 12-hour counter at 9, world time on 24 cities

The city ring occupies the outer edge of the dial, with each city name paired to a 24-hour indicator that shows day and night zones across the world simultaneously. The chronograph registers sit inboard of the city ring, maintaining readability despite the higher density of information displayed on the surface. Twelve hours sit at nine o’clock and thirty minutes at three, the central hand carries a red tip, London and the numeral 24 are printed in red, and no date window is cut anywhere into the blue.

Caliber Breakdown

The genuine Cal. 752A handles both jobs in one integrated movement, with a column wheel, a vertical clutch, 274 parts and 65 hours of reserve at 28,800 vph; the clone fitted here copies that architecture and winds to 55 hours. The world-time gearing sits under the city ring rather than on a plate of its own, which is how the Q905T480 keeps the Polaris profile instead of growing into a slab. The chronograph pushers operate independently of the world-time adjustment, so timing an event does not disturb the selected city or its associated timezone display. For a stripped-back counterpart in the same blue, compare the Polaris Date Q906868J in blue, which keeps time and date and swaps the city ring for a rotating inner diving bezel on a second crown. Both come from the Polaris collection, representing the absolute extremes in functional depth within the range.

How It Compares

World-time chronographs are uncommon at 42mm. Most competing brands push toward 44mm or larger case diameters to fit the additional displays comfortably, but the Q905T480 keeps the standard Polaris proportions fully intact. If you travel frequently across multiple time zones and also need chronograph timing capability, this is the single-watch answer within the Polaris platform. This Polaris Chronograph World Time clone packs more complication density into the standard Polaris case than any other reference currently available in the lineup.

No other reference here carries a city ring, which makes the drop in complication easiest to judge from the full Polaris list, where the two date models and the four plain chronographs sit beside it. The 752A measured against the brand’s simpler calibres appears in our breakdown of Jaeger-LeCoultre clone quality.

Specifications

• Model: Jaeger-LeCoultre Polaris Chronograph World Time
• Reference: Q905T480
• Case: stainless steel, brushed and polished (genuine Q905T480: grade 5 titanium)
• Case size: 42 mm (genuine Q905T480: 44 mm)
• Dial: blue, 24-city ring and white 24-hour scale with red accents
• Complications: chronograph, 30-minute counter at 3, 12-hour counter at 9, world time on 24 cities
• Movement: clone Cal. 752A, automatic, 28,800 vph
• Power reserve: 55 hours (genuine Cal. 752A: 65 hours)
• Water resistance: 100 m (same as genuine)
• Crystal: sapphire
• Strap: dark blue alligator leather