Specifications
- Reference
- 425.025
- Family
- 1815
- Category
- Chronograph
- Status
- Current
- Case material
- Platinum
- Case diameter
- 41.2 mm
- Case thickness
- 12.6 mm Official
- Lug-to-lug
- —
- Lug width
- —
- Water resistance
- 30 m
- Bezel
- —
- Calibre
- L101.2 Official
- Power reserve
- 58 h
- Frequency
- 21,600 vph (3 Hz)
Official product page · retrieved October 20, 2026
Does it fit your wrist?
Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.
No lug-to-lug figure exists for this reference yet, so fit cannot be computed.
Measurements and sources
Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.
Case thickness
| Value | Type | Source | Date |
|---|---|---|---|
| 12.6 mm | Official | A. Lange & Söhne Published as the case height. | October 20, 2026 |
Lug-to-lug
No source gave this figure yet.
Lug width
Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.
No source gave this figure yet.
Calibre source
Official A. Lange & Söhne · retrieved October 20, 2026
Other 1815 references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| 1815 Rattrapante Perpetual Calendar 421.025 | 41.9 mm | 14.7 mm | — | L101.1 |
| 1815 Chronograph 414.026 | 39.5 mm | 11 mm | 48.4 mm | L951.5 |
| 1815 Annual Calendar 238.026 | 40 mm | 10.1 mm | 46.6 mm | L051.3 |
| 1815 Tourbillon 730.032 | 39.5 mm | 11.1 mm | — | L102.1 |
| 1815 Up/Down (39 mm, pink gold) 234.032 | 39 mm | 8.7 mm | 45 mm | L051.2 |
| 1815 (calibre L051.1) 235.032 | 38.5 mm | 8.8 mm | — | L051.1 |
| 1815 Up/Down (37.5 mm, pink gold) 244.037 | 37.5 mm | 8.7 mm | — | L051.2 |
| 1815 (calibre L152.1) 220.037 | 34 mm | 6.4 mm | — | L152.1 |
Other A. Lange & Söhne models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Datograph Up/Down 405.035 | 41 mm | 13.1 mm | 48.4 mm | L951.6 |
| Datograph Handwerkskunst 405.048 | 41 mm | 13.1 mm | — | L951.8 |
| Datograph Perpetual 410.038 | 41 mm | 13.5 mm | — | L952.1 |
| Datograph Perpetual Tourbillon 740.056 | 41.5 mm | 14.6 mm | — | L952.2 |
| Datograph Perpetual Tourbillon Honeygold “Lumen” 740.055 | 41.5 mm | 14.6 mm | — | L952.4 |
| Triple Split 424.025 | 43.2 mm | 15.6 mm | — | L132.1 |