Answer

Reference 704.035 sits in the A. Lange & Söhne Lange 1 Tourbillon line. Replica versions copy the dial layout, the 38.5 mm case shape and the sapphire caseback. They do not copy the movement. Every replica sold under this number runs a third-party calibre and carries no Lange serial number and no service history.

What the genuine watch is

A. Lange & Söhne released the Lange 1 Tourbillon in 2000. Public databases put the platinum launch at 150 pieces. The tourbillon sits under the dial. You see the cage from the caseback. The dial keeps four elements: an off-centre time dial at 9 o'clock, an outsize date at 1 o'clock, a small seconds subdial at 5 o'clock and a power reserve indicator at 3 o'clock.

Public reference lists do not agree on every 704.xxx number. Confirm case metal and production run with the manufacturer or a paid database before you repeat a spec sheet.

Replica tiers and prices

  • 150 to 400 USD: steel case, automatic movement, decorative plate cut to look like a tourbillon bridge. The cage in the caseback view does not rotate.
  • 500 to 1,500 USD: Chinese hand-wound tourbillon carriage, 21,600 vph, 40 to 50 hours of run time. The cage rotates.
  • Above 1,500 USD: sapphire front and back, closer date font, better anglage. Still a third-party movement.

Checks before you pay

  1. Case size. Measure across the case at 3 and 9 o'clock, crown excluded. Genuine Lange 1 cases measure 38.5 mm.
  2. Thickness. Anything past 11 mm sits high on the wrist.
  3. Weight. Ask the seller for a gram figure. Platinum is dense. A steel replica weighs less.
  4. Date font. The outsize date uses two discs. Check that both digits share one baseline.
  5. Power reserve. Wind the watch until it stops, note the time, then check when it stops again.
  6. Caseback. Look for an engraved balance cock, blued screws and gold chatons. Replicas use plating and printed text.
  7. Hands. Lange hands are rhodiumed gold. Replica hands are steel or plated brass and read brighter under light.

Service and legal facts

A. Lange & Söhne does not service or authenticate replicas. Independent shops that work on Chinese tourbillons charge 80 to 250 USD for a clean and re-oil. Replacement parts come from the same sellers who supply the watches. Buy from a seller with a written return window of 14 days or longer.

Bottom line

A replica 704.035 buys the look of a Lange 1 Tourbillon at 1 to 5 percent of the genuine price. It does not buy the movement, the hand finishing or the resale value. Judge the caseback view and the running movement, not the box and papers.