Rolex · Cosmograph Daytona
Rolex Cosmograph Daytona (18 ct yellow gold, Cerachrom bezel)
Reference 126518LN · Chronograph · 40 mm
Specifications
- Reference
- 126518LN
- Family
- Cosmograph Daytona
- Category
- Chronograph
- Status
- Current
- Case material
- 18 ct yellow gold
- Case diameter
- 40 mm
- Case thickness
- 11.9 mm Third-party
- Lug-to-lug
- 46.5 mm Third-party
- Lug width
- —
- Water resistance
- 100 m
- Bezel
- Fixed, tachymetric scale
- Certifications
- Superlative Chronometer
- Calibre
- 4131 Official
- Power reserve
- about 72 h
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 46.5 mm on a flat top of 54.1 mm: 86 % 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 |
|---|---|---|---|
| 11.9 mm | Third-party | Bob's Watches Retailer size chart; the page says dimensions were taken with digital calipers on watches in its inventory and from other reputable sources. Figure listed for ref. 126500LN, the version of this case in another metal. | October 14, 2026 |
Lug-to-lug
| Value | Type | Source | Date |
|---|---|---|---|
| 46.5 mm | Third-party | Bob's Watches Retailer size chart; the page says dimensions were taken with digital calipers on watches in its inventory and from other reputable sources. Figure listed for ref. 126500LN, the version of this case in another metal. | October 14, 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 Rolex · 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.
Other Cosmograph Daytona references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Cosmograph Daytona (18 ct yellow gold) 126508 | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Cosmograph Daytona 126500LN | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Cosmograph Daytona (18 ct Everose gold, Cerachrom bezel) 126515LN | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Cosmograph Daytona (18 ct Everose gold) 126505 | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Cosmograph Daytona (18 ct white gold, Cerachrom bezel) 126519LN | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Cosmograph Daytona (18 ct white gold) 126509 | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Cosmograph Daytona (platinum, Cerachrom bezel) 126506 | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Cosmograph Daytona (Yellow Rolesor) 126503 | 40 mm | 11.9 mm | 46.5 mm | 4131 |
Other Rolex models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Air-King 126900 | 40 mm | 11.6 mm | 48 mm | 3230 |
| Explorer 40 224270 | 40 mm | 11.6 mm | 46.5 mm | 3230 |
| GMT-Master II (18 ct yellow gold) 126718GRNR | 40 mm | 12 mm | 47.6 mm | 3285 |
| GMT-Master II 126710BLNR | 40 mm | 12 mm | 47.6–48 mm | 3285 |
| GMT-Master II (18 ct Everose gold) 126715CHNR | 40 mm | 12 mm | 47.6 mm | 3285 |
| GMT-Master II (18 ct white gold) 126729VTNR | 40 mm | 12 mm | 47.6 mm | 3285 |