The short answer
A. Lange & Söhne does not make a watch called the Nocturne. Run through the brand's catalog and you get the Lange 1, Saxonia, 1815, Zeitwerk, Datograph, Richard Lange, and Odysseus families. No Nocturne anywhere. The name lives almost entirely in counterfeit listings on marketplaces, chat groups, and dropship sites, where sellers attach it to dark-dialed Lange look-alikes. So if you are hunting a "fake Lange Nocturne," understand up front that you are not chasing a replica of one specific reference. You are looking at a counterfeit wearing a made-up name, and that invented name is itself the first clue.
Why the name keeps turning up
There are two practical reasons sellers invent model names. A name the brand never used is hard to fact-check, and it slips past takedown filters that scan for trademarked reference names. "Nocturne" also does marketing work. It suggests night, black dials, moon phases, which is exactly the look most of these watches copy: the Lange 1 Moon Phase, the Saxonia Moon Phase, and the Grand Lange 1 Lumen, all of which lean dark or luminous. If a listing uses that word confidently, the seller is either guessing or lying.
What gives a counterfeit away
Case metal
Lange builds in gold and platinum. Steel shows up in a small number of prototypes and in the Odysseus, and that is basically it. A "Nocturne" in stainless steel with a display back is a fake before you even look at the dial. Same for anything described as gold-plated or gold-filled.
The outsize date
I look at the date aperture before anything else. On a genuine Lange, the two date discs sit on the same plane, the aperture edges are crisp, and the typeface is sharp with correct spacing. On a copy, you often see two separate windows at slightly different depths, a font that is a hair too wide, or a tens disc that moves on the wrong days. Film the date change if you can. Real mechanisms snap.
The movement
This is where fakes fall apart. A real Lange has a German silver three-quarter plate, blued screws, screwed gold chatons, and a balance cock engraved by hand, so no two are identical. Counterfeits show a plated movement with glued-on or printed decoration, plated screws instead of blued steel, and an engraved balance cock that repeats the same pattern across every unit. Ask for a macro shot of the balance cock and the jewel settings. Sellers who have them will send them.
Moon phase accuracy
A genuine Lange 1 Moon Phase drifts by one day roughly every 122 years. Copies use a printed disc on a simple 29.5-day gear train, or in cheaper builds a quartz module that steps once a day. Watch it over a week. Small irregularities add up fast.
Price and paperwork
Pre-owned Lange 1 Moon Phase and Saxonia Moon Phase pieces usually trade well into five figures. Anything offered at a few hundred dollars is not a bargain, it is a different object entirely. Real watches come with a box, papers, and often service history, and the serial number should be verifiable with the brand or an authorized dealer.
If you still want to inspect one in person
- Request macro photos of the balance cock, the date aperture, and the caseback engraving.
- Request a video of the date flipping and the moon phase advancing.
- Weigh it. Solid gold has a density you notice immediately.
- Compare reference and serial numbers across listings. Fakes reuse the same digits constantly.
- Have a watchmaker open the caseback before any money moves.
The legal side in the US
Buying a counterfeit for personal use carries risk. Selling, importing, or shipping one across a border carries more. Trafficking in counterfeit goods is a federal offense, and customs officers seize and destroy shipments, which means your money disappears with the package. Payment processors and marketplaces also shut down accounts tied to counterfeit sales. Budget for the loss if you go this route.
Alternatives worth the money
If the appeal is a dark dial with a moon phase and real finishing, several legitimate brands deliver it: the Frederique Constant Slimline Moonphase, the Longines Master Collection Moonphase, and the Oris Artelier Moon Phase all sit in four figures or below. If you want Lange itself, a pre-owned Saxonia is a far better long-term purchase than any counterfeit, and it holds value instead of shedding it.