A. Lange & Söhne
A. Lange & Söhne Zeitwerk 140.029
The A. Lange & Söhne Zeitwerk (reference 140.029) is a 41.9 mm 18k white gold watch with a black dial. It runs on the manual caliber L043.1 with a 36-hour power reserve. It was made from 2009 to 2021.
Specifications
Case
- Reference
- 140.029
- Collection
- Zeitwerk
- Case size
- 41.9 mm
- Thickness
- 12.6 mm
- Case material
- 18k white gold
- Case shape
- Round
- Crystal
- Sapphire
- Bracelet / strap
- Alligator leather strap
Dial and bezel
- Dial
- Black
Movement
- Movement
- Manual
- Caliber
- L043.1
- Power reserve
- 36 hours
- Frequency
- 18,000 vph
- Functions
- Jumping hour, Digital minutes, Small seconds, Power reserve indicator
Production
- Production
- 2009–2021
How it compares within the Zeitwerk family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 140.029 (This watch) | 41.9 mm | 18k white gold | Black | L043.1 | 2009–2021 |
| 140.021 | 41.9 mm | 18k yellow gold | — | L043.1 | 2009– |
| 140.025 | 41.9 mm | Platinum | — | L043.1 | 2009– |
| 140.032 | 41.9 mm | 18k pink gold | Silver | L043.1 | 2009–2021 |
| 142.025 | 41.9 mm | Platinum | Silver | L043.6 | 2022– |
| 142.031 | 41.9 mm | 18k pink gold | Black | L043.6 | 2022– |
| 145.032 | — | Pink gold | — | — | — |
| 148.033 | 44.2 mm | 18k pink gold | Grey | L043.8 | 2019– |
| 148.038 | 44.2 mm | 18k white gold | — | L043.8 | 2019– |
About the Zeitwerk family
The Zeitwerk was introduced in 2009 as a mechanical watch with a digital display: hours and minutes jump on discs read through a large window. Moving the discs at once needs a lot of energy, so the caliber L043.1 uses a constant-force mechanism to keep the rate stable.
Later versions include the Zeitwerk Minute Repeater, which chimes the time in decimal fashion, and the Zeitwerk Date of 2021 with caliber L043.8. The catalog lists pink, white, yellow and honey gold and platinum references. Dealers check that the jumping display works crisply and ask for service history.
Quick answers
- What size is the A. Lange & Söhne Zeitwerk 140.029?
- The A. Lange & Söhne Zeitwerk 140.029 has a 41.9 mm case, 12.6 mm thick.
- What movement does the A. Lange & Söhne Zeitwerk 140.029 use?
- It uses the manual caliber L043.1, with a 36-hour power reserve.
- Is the A. Lange & Söhne Zeitwerk 140.029 still in production?
- No. It was made until 2021.
- When did the A. Lange & Söhne Zeitwerk 140.029 come out?
- It was introduced in 2009 and made until 2021.
- What is the A. Lange & Söhne Zeitwerk 140.029 made of?
- The case is 18k white gold. Bracelet or strap: Alligator leather strap.
Catalog facts checked September 2026.