- Movement
- Manually wound
- Size
- 41 mm
Overview
The Datograph Perpetual in a 41 mm case
The A. Lange & Söhne Datograph Perpetual, reference 410.025 E, in a 950 platinum case, 41 mm across and 13.5 mm high, with a rhodié dial. Manually wound calibre L952.1 with outsize date, day/night indicator, moon-phase display, chronograph, day-of-week display and perpetual calendar, on a black alligator leather strap with a platinum prong buckle.
A. Lange & Söhne no longer makes this reference.
The movement is calibre L952.1, manually wound, with 556 parts and a reserve of 36 hours; the balance beats at 18,000 semi-oscillations an hour (2.5 Hz). Lange lists the outsize date, the day/night indicator, the moon-phase display, the chronograph, the day-of-week display and the perpetual calendar as its functions. The case is 13.5 mm high, water resistant to 3 bar, with a sapphire glass case back. The strap is alligator leather, closed with a prong buckle in the case metal.
Key details
Calibre L952.1
- Manually wound
- Outsize date, day/night indicator, moon-phase display, chronograph, day-of-week display and perpetual calendar
- 556 parts
- 18,000 semi-oscillations per hour (2.5 Hz)
- Power reserve 36 hours
The reference
Technical specifications
| Reference | 410.025 E |
|---|---|
| Collection | Saxonia |
| Calibre | L952.1 |
| Movement | Manually wound |
| Functions | Outsize date, day/night indicator, moon-phase display, chronograph, day-of-week display, perpetual calendar |
| Power reserve | 36 hours |
| Frequency | 18,000 semi-oscillations per hour (2.5 Hz) |
| Movement parts | 556 |
| Case dimensions | 41 mm |
| Case height | 13.5 mm |
| Case material | 950 platinum |
| Case back | Sapphire glass |
| Water resistance | 3 bar |
| Dial | Rhodié |
| Strap | Black alligator leather |
| Clasp | 950 platinum prong buckle |
| Status | Discontinued — A. Lange & Söhne no longer makes this reference |
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