Short Answer
A fake A. Lange & Söhne watch is a counterfeit built to imitate the Glashütte maker's hand-finished designs. The strongest tells sit in the movement. Real Lange calibers use a hand-engraved balance cock, a three-quarter plate, blued screws, and gold chatons held by screws. Counterfeits copy the outline and skip the finishing. Dial printing, case polishing, and serial numbers are the next checks.
What You Need Before You Start
- A 10x loupe or a macro lens.
- Bright, angled light.
- The reference number and its production window.
- Photos of an authentic example of the same reference.
Authentication Steps
- Write down the reference number from the caseback and confirm it exists in the Lange catalog.
- Look at the dial through the loupe and check that the printed name is sharp with no fuzzy edges or uneven spacing.
- Compare the hands against a photo of the real reference, checking shape, length, and polish.
- Turn the watch over and inspect the movement through the sapphire back.
- Find the balance cock and check for hand-engraved floral work, which appears on every real Lange.
- Check the three-quarter plate for Glashütte ribbing and engraved text.
- Inspect the screws: real ones are blued and polished, while fakes show plating or tool marks.
- Measure the case and compare it to the published diameter and thickness.
- Examine the crown and any pushers for fit, thread quality, and the engraved logo.
- Match the movement number against the caseback number and the paperwork.
- Weigh the watch and compare it to the known weight for the reference.
- Ask the seller for the original invoice, box, and service records.
Movement Tells
Lange finishes parts that no buyer will ever see. A counterfeit effort stops at the surface. Look at the balance cock under magnification: on a real watch the engraving is cut by hand, so line width varies and the pattern is unique to that piece. On a fake the pattern is stamped or laser-etched and repeats across examples. Real chatons are gold and held by polished screws. Fakes use gold-colored rings pressed into the plate or nothing at all. Check the screw heads for a domed, mirror-polished top with a clean slot. Worn or plated screws point to a counterfeit.
Dial and Case Tells
Lange prints dials with fine, dense ink. Under a loupe, authentic text has crisp borders and consistent stroke weight. Fakes show thick edges, misaligned markers, and a glossy finish where the real dial is matte or grained. Date windows on a real watch sit flush with clean bevels. Case polishing on a Lange runs in one direction per surface, with sharp transitions between brushed and polished areas. Counterfeit cases show rounded transitions and haze around the lugs. The crown engraving on a real piece is deep and centered. On a fake it is shallow, off-center, or missing.
Serial Numbers and Paperwork
Lange records the movement number, case number, and reference. These should match across the caseback, the movement, and the certificate. Engraved numbers on a real watch sit in a recessed area with even depth. Fakes use shallow laser marking or acid etching with rough edges. Paperwork is not proof on its own. Counterfeit sellers print convincing booklets, so confirm the numbers with the maker's archive before you pay.
Price and Seller Checks
A Lange in steel or gold holds value, and a price far below the market range for the reference is the first warning sign. Ask where the watch was purchased, whether the warranty card is filled in, and whether the seller will meet at a jeweler or service center for verification. A seller who refuses an inspection, pressures you to pay fast, or accepts only untraceable payment methods is a seller to avoid.
If the Watch Fails a Check
Stop the transaction. Do not send payment, and do not rely on a verbal promise of a refund. Report the listing to the platform, and if money has changed hands, file a dispute with your payment provider. For a watch you already own, a Lange service center or an independent watchmaker with Glashütte training can confirm the caliber and issue a written opinion for insurance or legal use.