Specifications
- Reference
- 131.10.39.20.02.001
- Family
- Constellation
- Category
- Classic
- Status
- Current
- Case material
- Stainless steel
- Case diameter
- 39 mm
- Case thickness
- 12.4 mm Official
- Lug-to-lug
- 41 mm Official
- Lug width
- —
- Water resistance
- 50 m
- Bezel
- Fixed
- Certifications
- METAS Master Chronometer
- Calibre
- 8800 Official
- Power reserve
- 55 h
- Frequency
- 25,200 vph (3.5 Hz)
Official product page · retrieved October 15, 2026
Does it fit your wrist?
Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.
Comfortable
Lug-to-lug 41 mm on a flat top of 54.1 mm: 76 % of the width.
Lug-to-lug is 75 to 95% of the flat top, the usual comfortable range.
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 |
|---|---|---|---|
| 12.43 mm | Official | Omega | October 15, 2026 |
Lug-to-lug
| Value | Type | Source | Date |
|---|---|---|---|
| 41 mm | Official | Omega | October 15, 2026 |
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 Omega · retrieved October 15, 2026
Other versions in the same case
These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.
- 131.10.39.20.06.001 · Grey dial, bracelet
Other Constellation references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Constellation Observatory 39.4 mm 140.13.39.21.02.001 | 39.4 mm | 12.2 mm | 47.2 mm | 8914 |
| Constellation 39 mm (steel and Sedna gold) 131.20.39.20.02.001 | 39 mm | 12.4 mm | 41 mm | 8800 |
| Constellation 39 mm (steel and yellow gold) 131.20.39.20.02.002 | 39 mm | 12.4 mm | 41 mm | 8800 |
| Constellation Observatory 39.4 mm (Canopus gold) 140.53.39.21.99.004 | 39.4 mm | 12.2 mm | 47.2 mm | 8915 |
| Constellation Observatory 39.4 mm (Moonshine gold) 140.50.39.21.99.001 | 39.4 mm | 12.2 mm | 47.2 mm | 8915 |
| Constellation Observatory 39.4 mm (platinum and gold) 140.93.39.21.99.001 | 39.4 mm | 12.3 mm | 47.2 mm | 8915 |
| Constellation Observatory 39.4 mm (Sedna gold) 140.53.39.21.99.002 | 39.4 mm | 12.2 mm | 47.2 mm | 8915 |
| Constellation 41 mm 131.30.41.21.04.001 | 41 mm | 13.5 mm | 44 mm | 8900 |
| Constellation 41 mm (steel and Sedna gold) 131.23.41.21.06.001 | 41 mm | 13.5 mm | 44 mm | 8900 |
| Constellation 41 mm (steel and yellow gold) 131.23.41.21.06.002 | 41 mm | 13.5 mm | 44 mm | 8900 |
| Constellation 41 mm (yellow gold) 131.63.41.21.01.001 | 41 mm | 13.5 mm | 44 mm | 8901 |
| Constellation Quartz 36 mm 131.10.36.60.01.001 | 36 mm | — | 39.1 mm | 4564 |
| Constellation Quartz 36 mm (steel and yellow gold) 131.20.36.60.02.002 | 36 mm | — | 39.1 mm | 4564 |
| Constellation Small Seconds 34 mm 131.10.34.20.02.001 | 34 mm | 11.7 mm | 37 mm | 8802 |
| Constellation Small Seconds 34 mm (Sedna gold) 131.58.34.20.61.001 | 34 mm | 11.7 mm | 36.9 mm | 8803 |
| Constellation Small Seconds 34 mm (steel and Sedna gold) 131.20.34.20.63.001 | 34 mm | 11.7 mm | 37 mm | 8802 |
| Constellation 29 mm 131.15.29.20.60.001 | 29 mm | 12 mm | 31.2 mm | 8700 |
| Constellation 29 mm (steel and Moonshine gold) 131.25.29.20.58.002 | 29 mm | 12 mm | 31.2 mm | 8700 |
| Constellation 29 mm (steel and Sedna gold) 131.25.29.20.52.003 | 29 mm | 12 mm | 31.2 mm | 8700 |
Other Omega models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| De Ville Trésor 40 mm 435.13.40.21.02.001 | 40 mm | 10.1 mm | 44.8 mm | 8910 |
| De Ville Trésor Power Reserve 40 mm 435.13.40.22.01.001 | 40 mm | 10.1 mm | 44.8 mm | 8934 |
| De Ville Trésor Small Seconds 40 mm 435.13.40.21.03.002 | 40 mm | 10.1 mm | 44.8 mm | 8926 |
| Seamaster Aqua Terra 150M 38 mm 220.10.38.20.01.004 | 38 mm | 12.3 mm | 45.1 mm | 8800 |
| Seamaster Aqua Terra Shades 38 mm 220.10.38.20.03.003 | 38 mm | 12.3 mm | 44.9 mm | 8800 |
| De Ville Trésor Power Reserve 40 mm (yellow gold) 435.53.40.22.02.001 | 40 mm | 10.7 mm | 44.8 mm | 8935 |