If you searched for replica tourbograph 510.105 because a listing caught your eye, here is the short answer. The reference number is the most trustworthy thing in that listing, and the watch it names is a high horology chronograph from A. Lange & Söhne, not a generic tourbillon. Our top pick for anyone chasing this reference is a documented pre-owned genuine example, judged on four criteria: provenance paperwork, serviceability, legal exposure in the United States, and resale liquidity. Counterfeit builds of this reference fail at least two of those four. This guide does not rank or recommend counterfeit sellers.

What reference 510.105 points to

A. Lange & Söhne numbers its watches in a six digit pattern, and Tourbograph is the name the manufacture gives to a chronograph combined with a tourbillon. The Pour le Mérite versions of that line add a fusée and chain transmission, a constant force device that is hard to produce in series. Chronograph plus tourbillon plus chain is one of the toughest assemblies in watchmaking, which is why output volume is small and waiting lists are long.

If 510.105 does not appear in the manufacture's own records, that matters. Replica listings borrow real reference numbers and print them on cases that share nothing with the original except the typeface. Confirm the number with the manufacturer or an authorized dealer before you treat any listing as accurate.

Counterfeit builds sold under this reference

Sellers describe these as 1:1 or super clone. The claims are consistent, and so are the gaps.

  • Claimed pro: the case silhouette and dial layout read correctly from a few feet away.
  • Claimed pro: a tourbillon cage visible at the six o'clock position, which cheap fakes skip.
  • Con: the cage is often a decorated balance assembly rather than a working tourbillon, and it cannot be regulated or serviced like a real escapement.
  • Con: hand finishing is what separates this reference from everything else, and bevels, mirror finished steel parts, and the engraved balance cock do not survive magnification on a fake.
  • Con: no manufacturer will touch it, and many independent watchmakers decline counterfeit movements.
  • Con: resale value sits near zero, and the case metal is seldom what the caseback stamps claim.

Use case: for someone who wants a mechanical object that still runs in ten years, there is no version of this purchase that makes sense. As costume it works. As a watch it does not.

Pre-owned genuine example

  • Pro: the manufacture services it, and service records become part of its history.
  • Pro: it holds value in a way no counterfeit does.
  • Pro: the complications are real, so the watch does what the dial says.
  • Con: the entry price is high and supply is thin.
  • Con: the pre-owned market for this reference contains fakes, so paperwork and a manufacturer check matter.
  • Con: servicing a tourbillon with a chain transmission costs real money and takes months.

Use case: a collector who wants the actual object and intends to keep it.

Legitimate tourbillon watches from other makers

  • Pro: a working tourbillon with a warranty and published specifications.
  • Pro: no import seizure risk and no counterfeit liability.
  • Pro: parts and service exist.
  • Con: the design language differs, and finishing will not match a Lange.
  • Con: resale is weaker than the established Swiss houses.

Use case: someone who wants to own a real tourbillon and does not need this specific name on the dial. Several makers, including Chinese manufactures with long histories, sell tourbillons under their own brands with published movements.

US legal and import reality

Trafficking in counterfeit goods is a federal crime under 18 U.S.C. § 2320, and counterfeit merchandise shipped into the United States is subject to seizure and destruction by U.S. Customs and Border Protection. Trademark owners can record their marks with the agency and pursue civil claims against sellers and, in some cases, buyers who resell. Practical effect: a counterfeit watch is a package that can be taken, with no refund and no recourse.

If someone offers you one as genuine

  1. Ask for the reference number in writing and confirm it with the manufacturer.
  2. Ask for service history from an authorized service center, not a receipt from a dealer.
  3. Inspect the movement through a loupe. Even finishing and an engraved balance cock are the point of this reference; fakes cannot reproduce that.
  4. Treat a price far under the documented market for a genuine example as the loudest signal in the room.

Bottom line

The reference number 510.105 is a piece of information, not a product. It tells you which watch a listing wants you to think about. Everything after that, the movement, the finishing, the paperwork, the legal standing, is where counterfeit listings stop. If you want the Tourbograph, buy the genuine article pre-owned with documentation. If you want a tourbillon, buy one from a maker who puts its own name on the dial.