Reference Q1428171 is the black-dial Geographic on a steel bracelet, and the JLC Master Geographic Q1428171 puts four readings on that dark surface: a RESERVE DE MARCHE arc at ten running 10 to 40 with a red sector at the empty end, a pointer date at two with the 31 picked out in red, a second-time-zone sub-dial at six, and a city ring around the lower edge. The 39mm stainless steel case matches the rest of the Master Control collection in diameter, yet the black background pushes the city disc and second time zone display into higher contrast. Jaeger-LeCoultre applied polished indices and hands that reflect sharply against the dark surface, making the primary time zone immediately legible. The secondary hour track and city indicator occupy their own registers, preserving the dial organization that makes the Geographic complication functional rather than decorative.

Case & Movement Specs

• Case diameter: 39mm
• Case material: stainless steel
• Reference: Q1428171
• Dial: black with city disc and second time zone
• Crystal: sapphire
• Hands: polished, luminous accents
• Movement: clone Cal. 939A, automatic, 28,800 vph
• Functions: hours, minutes, central seconds, pointer date, second time zone, 24-hour day and night aperture, power reserve, city ring

The Q1428171 uses the same geographic movement architecture as the silver-dial variant. Local time adjusts through the crown while the home city stays fixed, so crossing time zones requires a single adjustment rather than recalculating both displays.

Caliber Breakdown

Cal. 939A splits the job between two crowns. The one at ten turns the city ring along the bottom of the dial, and the sub-dial at six jumps to the hour of whichever city stops at the marker – on this example the ring is parked on Europe, with London marked GMT between the Azores and Paris. The crown at three moves local time and the date and leaves the second zone untouched. Change one and the other holds, which is the opposite of how an offset GMT hand behaves. On a black dial, the polished hands and applied markers create starker contrast points than on silver or white versions. The overall effect makes this Q1428171 easier to read in low light than its lighter sibling. Place it next to the silver-dial Q1428121 and the personality shift is clear: same complication, opposite mood. Both are part of the Master Control collection, offering the geographic function in two distinct visual registers.

How It Compares

Black-dial Geographic models trade the daytime versatility of silver dials for stronger legibility in dim environments. The polished elements pop more aggressively against the dark background, which makes reading both time zones faster at a glance. If your travel schedule includes evening flights or late meetings across time zones, the darker dial works harder for you. The JLC Master Geographic Q1428171 delivers the same mechanical substance as every Geographic reference while wrapping it in a presentation that favors contrast and drama over neutral elegance.

A black ground with a red sector at the empty end of the reserve arc reads very differently from the silver, eggshell and gold Geographics filed beside it. For the wider picture, the best Jaeger-LeCoultre super clones compared puts the 939A against the rest of the brand’s calibres.

Specifications

• Model: JLC Master Geographic Q1428171
• Reference: Q1428171
• Case: stainless steel, second crown at 10 o’clock for the city ring
• Case size: 39 mm
• Dial: black, polished applied 12 and dart indices, luminous dot at every hour, city ring along the lower edge
• Complications: power reserve arc at 10 graduated 10 to 40 with a red sector, pointer date at 2, second time zone sub-dial at 6, 24-hour day and night aperture
• Movement: clone Cal. 939A, automatic, 28,800 vph
• Power reserve: 40 hours (genuine Cal. 939A: 43 hours)
• Water resistance: 50 m (same as genuine)
• Crystal: sapphire
• Bracelet: polished and brushed stainless steel