A replica Datograph Up/Down copies the outside of A. Lange & Söhne's flyback chronograph. It does not copy the caliber. Every replica you can buy today uses a different movement, so the date font, the subdial spacing, the pusher feel, and the power reserve behavior are where the watch either holds up or falls apart. Confirm those four things before you pay, and confirm the return policy in writing.
What the genuine watch does
Lange released the Datograph in 1999 and the Up/Down version in 2012. Up/Down refers to the power reserve display added at the 8 o'clock position. The manual-wind caliber L951.6 carries a 60-hour reserve, up from the 36 hours of the first generation. The case is 41 mm across and roughly 13 mm thick in platinum or pink gold. The dial has an outsize date at 12 o'clock, a chronograph minute counter, small seconds, and the reserve indicator. Inside, a column wheel and horizontal clutch drive a flyback function with more than 400 parts. Finishing is done by hand: beveled bridges, perlage, heat-blued screws, and a hand-engraved balance cock.
Replica tiers and what changes at each level
Entry tier
Usually a plated steel case, an off-the-shelf automatic movement, and a printed date disc. The subdials sit too close to the center, the date numerals are heavy, and the power reserve hand is often decorative and does not move.
Mid tier
Closer case proportions, sapphire crystal, and better dial printing. The chronograph usually works, but the reset is abrupt and the pushers feel soft. Caseback decoration is stamped or laser-etched rather than beveled.
Top tier
Best-case clone with correct 41 mm proportions, engraved movement plates, and a working reserve indicator. Even here the gear train, the clutch type, and the hand finishing do not match the original. Treat any claim of a true 1:1 movement as marketing, not fact.
Before you start
- Save clear reference photos of the genuine dial, caseback, and date from a dealer listing or catalog.
- Set a budget and decide in advance which flaws you can live with.
- Know that in the US, selling or importing counterfeit branded goods is illegal, and any watch you buy is not the branded product.
How to check a replica Datograph Up/Down
- Ask the seller for exact case diameter and thickness, then compare those numbers with the genuine 41 mm by 13 mm.
- Request a straight-on dial photo and lay it over your reference image to check subdial spacing and date position.
- Zoom into the date apertures and compare numeral shape, weight, and spacing with the reference photo.
- Wind the crown and watch the reserve hand, if the model has one, to see whether it actually moves.
- Run the watch down fully and time the reserve to see whether it reaches anywhere near 60 hours.
- Start the chronograph, then press reset while it runs to test whether the flyback snaps to zero and restarts in one press.
- Press each pusher several times and note the click: a clean, firm engagement suggests a column wheel, a soft grind suggests a modular add-on.
- Look through the caseback for a column wheel, a horizontal clutch, and beveled edges on the bridges.
- Weigh the watch and compare it with the expected weight for the metal advertised.
- Get the return window, payment method, and shipping terms in writing before you send money.
Legal and practical notes
Counterfeit watches are seized at the border in the US, and sellers can face criminal penalties. That risk sits with the buyer as well as the seller, and many replica storefronts disappear before a dispute is filed. Pay with a method that allows a chargeback, keep the listing screenshots, and never rely on a verbal promise of a refund. If a seller refuses to answer basic questions about dimensions, movement type, or returns, walk away. The same caution applies if the price looks far below every other listing for the same model.
Bottom line
A replica Datograph Up/Down can look convincing on a wrist from arm's length. Under a loupe, and on a timegrapher, it is a different watch. Buy for the look, verify the four failure points, and keep your expectations tied to the tier you are actually paying for.