The Q902843J adds chronograph registers to the 42mm Polaris platform, and this JLC Polaris Chronograph grey dial reference builds on that foundation with a clean two-register layout at three and nine o’clock. A tachymetre scale printed on the fixed dial flange and pushers flanking the crown give the watch proper timing capability, while the overall case dimensions remain identical to the time-only Polaris references at exactly 42mm across. It is a purposeful upgrade for anyone who needs a stopwatch function within the same case architecture, adding complication without altering the fundamental wrist presence that defines the Polaris silhouette.

Case & Movement Specs

• Case diameter: 42mm
• Case material: stainless steel with alternating brushed and polished surfaces
• Dial: lacquered grey gradient, pale silver centre to anthracite chapter ring, orange accents
• Crystal: sapphire with anti-reflective coating
• Flange: fixed tachymetre scale with orange minute dots
• Pushers: round chronograph pushers at 2 and 4 o’clock
• Movement: clone Cal. 761, automatic, 28,800 vph
• Functions: hours, running seconds at 9, central chronograph seconds, 30-minute counter at 3

The two-register layout keeps the dial balanced and avoids the visual congestion of triple-register competitors. Elapsed seconds run on the central hand, the 30-minute counter sits at three under an orange 30, and the running seconds live at nine on a 60-unit scale topped by an orange 60. No date window and no third register interrupt the lacquer.

Caliber Breakdown

The genuine Cal. 761 is a fully integrated chronograph rather than a module stacked on a time-only base, with a column wheel, a vertical clutch, twin barrels, 28,800 vph and 65 hours of reserve. The clone in this case follows the same running-seconds layout and holds 55 hours, and the column-wheel action shows in how the pushers engage with short travel and minimal overtravel. For a different dial tone at the same 42mm, the Polaris Chronograph in blue swaps the grey lacquer for a layered blue finish. Both are available through the Polaris collection, though the blue Q9028480 is the earlier design: it carries a 12-hour counter at nine on Cal. 751H instead of the running seconds used here.

How It Compares

Against competing 42mm chronographs from other houses, the Polaris Chronograph distinguishes itself through the lacquered dial and the clean two-register approach rather than the three-register layouts most rivals default to. The Q902843J in grey is the most understated dial in the chronograph range, and the orange accents keep it from reading flat. This JLC Polaris Chronograph grey dial delivers the full timing suite in a case that transitions from weekend to weekday without compromise or hesitation.

Cal. 761 is the most recent chronograph movement to reach the line, and the other six Polaris on the shelf show what it replaced. If you are choosing between generations before you buy, which JLC clones are worth the money ranks them against the rest of the catalogue.

Specifications

• Model: Jaeger-LeCoultre Polaris Chronograph, 2023 generation
• Reference: Q902843J
• Case: stainless steel, brushed case band and polished bezel
• Case size: 42 mm
• Dial: lacquered grey gradient with orange accents
• Complications: chronograph, 30-minute counter at 3, running seconds at 9, tachymetre
• Movement: clone Cal. 761, automatic, 28,800 vph
• Power reserve: 55 hours (genuine Cal. 761: 65 hours)
• Water resistance: 100 m (same as genuine)
• Crystal: sapphire
• Strap: black alligator-grain leather