Quick answer
A. Lange & Söhne builds roughly 5,000 to 6,000 watches a year in Glashütte, Germany. Output is tiny, the entry price sits near $20,000, and most references trade above retail on the secondary market. Counterfeits exist, mostly of the Lange 1, the Datograph, and the Saxonia, and they fail under a loupe. Five checks settle the question: case dimensions, total weight, dial printing, movement finishing, and serial number against the papers.
Prerequisites
- 10x jeweler's loupe
- Digital scale accurate to 0.1 g
- Caliper or a ruler that reads millimeters
- Original papers, invoice, or service record if available
- A watchmaker willing to open the caseback
Step by step: how to tell a fake Lange
- Measure the case width and thickness with calipers. Compare both numbers to the published specification for that reference. Lange holds tight tolerances here. A Lange 1 that measures 40 mm across when the reference calls for 38.5 mm is wrong.
- Weigh the watch with the strap off. A solid gold Lange 1 with the movement lands near 90 to 110 g depending on metal. Plated brass and steel copies come in well under that.
- Look at the dial print with the loupe. Real printing has sharp edges and even thickness on every letter. Copies show ink spread, a drifting baseline, and fuzzy edges on the words Glashütte I/SA.
- Study the outsize date. Genuine Lange date discs are separate and sit flush with the dial. Fakes use one printed disc, or two discs with mismatched fonts and a visible gap between them.
- Check the hands. Genuine hands are heat blued steel or polished gold with a deep, even color. Painted blue hands look flat and purple under magnification.
- Turn the watch over and inspect the movement. Real Lange movements use a Glashütte three quarter plate, gold chatons, blued screws, and a hand engraved balance cock. Each engraving is cut freehand by one person and shows irregular strokes. Machine engraving looks identical on every copy.
- Verify the serial number and reference number. Both are engraved on the movement and on the caseback. They must match the certificate and the factory record.
- Price the reference against completed dealer and auction sales. If the asking price sits 30 percent or more below that range, the watch is fake, stolen, or both.
Details the copies miss
Movement finishing
Lange anglage is drawn by hand, so bevels are wide and polished with a soft inner angle at every corner. Fakes show a rounded, machined bevel with a matte edge. Screws on a real piece are blued steel with polished slots. On a copy they are painted or left bright.
Case and crystal
The case should carry crisp lugs with a defined bevel and a signed crown. Sapphire crystals on real pieces have a subtle anti reflective coating that shifts color at an angle. Cheap fakes use plain mineral glass or coated sapphire with heavy blue flare.
Metal and production reality
The catalogue is gold and platinum. Steel appears only in rare exceptions such as the Odysseus. Lange does not sell through duty free discounters, clearance sites, or mass market channels. Any offer that claims a new Lange at a bulk discount is a counterfeit listing.
Seller red flags
- Stock photos only, no in hand images of the actual watch
- Pressure to pay by wire transfer or crypto
- Refusal to meet at a watchmaker for inspection
- Serial numbers that change between messages
- A story about a relative or estate that explains the low price
If you already bought a counterfeit
Stop the payment while it is still pending. Report the transaction to your card issuer and to the platform that hosted the listing. Keep every message and photo. A watchmaker can document the counterfeit in writing, and that document supports a chargeback. Report the sale to the intellectual property enforcement body in your country.