- Movement
- Manually wound
- Size
- 45.9 mm
Overview
The Lange 31 in a 45.9 mm case
The A. Lange & Söhne Lange 31, reference 130.039F, in an 18-carat white gold case, 45.9 mm across and 15.9 mm high, with a grey dial. Manually wound calibre L034.1 with outsize date, power-reserve indicator and constant-force escapement, on a dark brown alligator leather strap with a white gold deployant buckle.
Lange says the Lange 31 is the first mechanical wristwatch in the world to combine a reserve of 31 days with a patented constant-force escapement. This reference is in white gold, with a grey dial of solid silver. Lange limits this version to 100 pieces.
The movement is calibre L034.1, manually wound, with 406 parts, a reserve of 744 hours and a balance beating at 21,600 semi-oscillations an hour (3.0 Hz). Lange lists the outsize date, the power-reserve indicator and the constant-force escapement. The case is 15.9 mm high, water resistant to 3 bar, with a sapphire glass case back. The strap is dark brown alligator leather, closed with a deployant buckle in 18-carat white gold.
Key details
Design and engineering
- DialA grey dial in solid silver.
- Power reserve744 hours, which Lange gives as 31 days; the power-reserve indicator is listed as a function.
- Constant-force escapementDescribed by Lange as patented and listed among the functions of calibre L034.1.
- Case18-carat white gold, 45.9 mm across and 15.9 mm high, with a sapphire glass case back and water resistance of 3 bar.
- Strap and buckleDark brown alligator leather on a lug distance of 22 mm, closed with an 18-carat white gold deployant buckle.
Calibre L034.1
- Manually wound
- Outsize date, power-reserve indicator and constant-force escapement
- 406 parts
- 21,600 semi-oscillations per hour (3.0 Hz)
- Power reserve 744 hours
The reference
Technical specifications
| Reference | 130.039F |
|---|---|
| Collection | Saxonia |
| Calibre | L034.1 |
| Movement | Manually wound |
| Functions | Outsize date, power-reserve indicator, constant-force escapement |
| Power reserve | 744 hours |
| Frequency | 21,600 semi-oscillations per hour (3.0 Hz) |
| Movement parts | 406 |
| Case dimensions | 45.9 mm |
| Case height | 15.9 mm |
| Case material | 18-carat white gold |
| Case back | Sapphire glass |
| Water resistance | 3 bar |
| Dial | Grey |
| Strap | Dark brown alligator leather |
| Clasp | 18-carat white gold deployant buckle |
| Distance between lugs | 22 mm |
| Limited edition | 100 pieces |
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