The fake Datograph Up/Down is a replica of the A. Lange & Söhne Datograph Up/Down, a 41mm platinum chronograph with a big date at 12 o'clock and a power reserve display near 6 o'clock. A replica can copy the dial layout, the case profile, and the wrist presence, but it cannot match the hand-finished L951.6 movement, the column wheel chronograph feel, or the long-term value of the genuine watch.
What "Up/Down" Means on This Watch
Auf und Ab is German for up and down, and on this model it names the power reserve indication. The display tells the wearer how much of the movement's 60-hour reserve remains before the watch needs winding again. Because the genuine movement is hand-wound rather than automatic, that indicator is a daily-use feature, not decoration. A fake Datograph Up/Down that prints the scale on the dial without connecting it to anything is the most common shortcut you will see.
Why the Datograph Is Hard to Copy
Most replica chronographs start from a stock movement and a printed dial. This design resists that approach.
- Big date: the twin aperture at 12 uses two discs of different sizes, and the genuine mechanism jumps instantly at midnight. Budget replicas drift, sit unevenly, or leave a visible gap between the discs.
- Subdial layout: running seconds sit at 8 o'clock and the 30-minute counter sits at 4. Many clone movements are built for a 3-6-9 arrangement, so the subdial positions get fudged or the hands do not land where they should.
- Chronograph action: the original runs a column wheel with a horizontal clutch. Pusher resistance and the clean start of the sweep hand are part of the experience, and bolt-on chronograph modules feel soft by comparison.
- Finishing: ribbing on the bridges, a hand-engraved balance cock, blued screws, and polished bevels. Machine finishing looks flat under magnification.
Movement Options Inside a Datograph Up/Down Replica
Replica builds fall into rough tiers, and the movement is what separates them.
- Quartz: the cheapest option. The chronograph works, but the running seconds hand ticks instead of sweeping.
- Automatic with an added chronograph module: a rotor sits behind a display back the original never had, and the extra module adds thickness.
- Hand-wound clones: the Seagull ST19 family and similar column wheel designs come closest in feel and in the view through the back.
- Decorated builds: the same base movements with hand-applied engraving, perlage, and blued screws fitted by a workshop rather than a factory line.
Case, Dial, and Crystal Details to Inspect
- Case size should land near 41mm with a thickness close to 13mm. A build that wears much thicker than that usually hides a modular movement.
- Check the metal. Genuine examples are platinum, which has a distinct gray-white tone and real heft. Steel with a bright polish looks different on the wrist.
- Look at the markers and the signature. Applied markers sit above the dial surface; printed ones do not. The Made in Germany line under the brand name should be crisp and correctly spaced.
- Sapphire crystal with coating on both sides keeps reflections low. Mineral glass gives itself away with glare and fine scratches over time.
- Strap and clasp quality matter, since the original ships on a hand-stitched alligator strap with a matching deployant.
Finishing: Where the Copy Shows
Turn the watch over if it has a display back. Genuine Glashütte finishing is applied by hand, so bevels catch light along their full length and the engraving on the balance cock is cut with a graver, not stamped. On replicas the bevels often fade where the machine stopped, and engraving looks shallow and repetitive. Dial-side, look at the date discs: sharp printing, matching font weight, and no visible seam between the two windows.
A Buying Checklist
- Ask for a video of the chronograph starting, stopping, and resetting to zero.
- Request footage of the date change so you can see whether it snaps or crawls.
- Confirm that the small seconds runs continuously while the 30-minute counter only moves when the chronograph is engaged.
- Ask for photos of the actual watch, not catalog renders.
- Confirm case diameter, thickness, and weight before paying.
- Get the return window and warranty terms in writing.
Price Tiers and What They Buy
Entry builds get the look at a distance and little else. Mid-tier pieces add a working power reserve display and better dial printing. The top tier puts money into the movement, the finishing, and the case, which is why the gap between a mid-tier and a top-tier fake Datograph Up/Down usually shows up on the back of the watch rather than the front.
Practical Notes Before You Buy
A replica is not a genuine A. Lange & Söhne watch, so there is no factory service, no parts channel, and no collector value. Import rules for replica goods differ by country, and a warranty from a dealer is only as good as the dealer. Treat the purchase as a fashion decision with a defined budget, and judge the watch on how it looks and feels rather than on what the name suggests.