Quick answer

A fake Lange 1 Time Zone is judged on the dial, not on the logo. The real watch is a hand-wound two-time-zone piece with an off-centre main dial, an outsize date, a power reserve indicator and a 24-city ring that advances with a pusher at 8 o'clock. When a replica gets the layout, the 41.9 mm case and the day/night logic right, it reads as correct from a normal viewing distance. When it misses the city ring function or the case proportions, no amount of polishing saves it.

Core specs to match

  • Case: 41.9 mm across, roughly 11 mm thick, in yellow gold, pink gold or platinum finish.
  • Dial: off-centre time dial at 9, outsize date at 1, power reserve at 3, second time zone dial at 5.
  • City ring: 24 city names around the outer edge, stepped by a pusher on the left case flank.
  • Movement: hand-wound, about 72 hours of reserve, shown through a sapphire caseback.

Why the city ring exposes most fakes

The ring carries 24 cities and each press of the pusher moves it one hour so the second zone dial stays tied to a real place. Cheap copies print the names and fix the ring in place. Press the pusher and nothing moves. Better copies step the ring but scramble the city order, or run the day/night disc in the second zone dial at the wrong hour. Check that the ring moves in single one-hour steps and that the day/night aperture flips near 6 a.m. and 6 p.m. local time.

Dial and hand finishing

Study the printed scale on the power reserve indicator. Genuine examples show crisp AUF and AB lettering with even spacing. Copies thicken the strokes and blur the small text. The outsize date should snap in one jump, sit level inside its frame and match the dial colour. Blued hands on a copy are often painted, which shows a flat purple under direct light instead of a deep blue that shifts with the viewing angle.

Caseback and movement details

Turn the watch over. The movement plate on a serious copy carries engraved lettering with visible depth, and the screws sit flush in polished chatons. Flat grey text stamped into the plate and mismatched screw heads point to a low grade build. Winding should feel smooth across the full range, with a clear stop rather than a grind at the end of the reserve.

Inspection checklist

  1. Measure the case at the widest point. It should read 41.9 mm.
  2. Press the pusher once and confirm the city ring advances by one city, not two.
  3. Run the second zone dial through a full cycle on the crown and watch the day/night aperture.
  4. Advance the outsize date and confirm it jumps once near midnight instead of creeping.
  5. Flip the watch and check that the movement engraving has depth.
  6. Rest the watch on a flat surface and confirm the crystal sits level with the bezel.

Red flags

  • Case under 41 mm or over 43 mm.
  • Fixed city ring or two-hour jumps.
  • Second zone dial with no day/night indicator.
  • A ticking seconds hand, which means quartz.
  • Small centred date instead of the offset outsize date.

Tier expectations

Entry copies run 38 to 40 mm, use painted city names and a dead pusher. Mid tier adds the correct case size and a moving ring but keeps the day/night display static. Top tier copies the full layout, the working ring and a finished hand-wound movement. Match the tier to what you plan to do with the watch, and inspect the ring function before you commit.