Short answer
"Zeitwerk 306.104" is not a reference number in the public A. Lange & Sohne catalog. The Zeitwerk line uses six-digit references such as 140.029 and 142.025. A listing that pairs "Zeitwerk" with "306.104" is a typo, a seller's internal code, or a made-up number. Treat any replica sold under that number as an unverified product.
What the Zeitwerk is
A. Lange & Sohne introduced the Zeitwerk in 2009. It shows hours and minutes with jumping numerals instead of hands. Case size is 41.9 mm. The movement is the in-house L043.1, manual wind, with a constant-force escapement. Production volume is low and allocation runs through boutiques.
high quality zeitwerk 306.104 replica
- Reference format: NNN.NNN, for example 140.029
- Display: three jumping numeral discs
- Materials: white gold, pink gold, platinum
- Price band: tens of thousands of dollars and higher
How replicas differ
No replica reproduces the jumping numeral module at Lange tolerance. Common gaps:
- Movement: quartz or a stock automatic. Discs skip, lag, or drift.
- Case: 316L steel instead of gold. Weight is lower.
- Finishing: machine-polished bridges. No hand-engraved balance cock.
- Dial: printed numerals with small misalignment at the aperture edges.
- Price: $200 to $900 against six figures for the genuine watch.
What to check on any listing
- Reference number format. Lange numbers follow NNN.NNN.
- Caseback photos. Ask for the movement and balance cock.
- Serial match between papers, box, and caseback.
- Service records from an authorized Lange service center.
Legal note
Importing counterfeit watches violates 18 U.S.C. 2320 in the United States. U.S. Customs and Border Protection seizes such shipments at ports of entry. Resale carries criminal exposure.