Specifications
- Reference
- 126710BLNR
- Family
- GMT-Master II
- Category
- GMT / travel
- Status
- Current
- Case material
- Oystersteel
- Case diameter
- 40 mm
- Case thickness
- 12 mm Third-party
- Lug-to-lug
- 47.6–48 mm 2 sources
- Lug width
- —
- Water resistance
- 100 m
- Bezel
- Rotating, 24 h (GMT)
- Certifications
- Superlative Chronometer
- Calibre
- 3285 Official
- Power reserve
- about 70 h
Official product page · retrieved October 14, 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 48 mm on a flat top of 54.1 mm: 89 % 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 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. 126710GRNR, which shares this case. | October 14, 2026 |
Lug-to-lug
| Value | Type | Source | Date |
|---|---|---|---|
| 47.6 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. 126710GRNR, which shares this case. | October 14, 2026 |
| 48 mm | Community | Omega Forums (user Walrus, citing a third-party guide) Posted as a reference list. The author says he cannot vouch for its accuracy and the measuring method is not stated. | 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 14, 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.
- M126720VTNR-0001 · Left-hand crown
- M126710GRNR-0003
- M126710BLNR-0003
- M126710GRNR-0004
- M126720VTNR-0002 · Left-hand crown
Other Rolex models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Explorer II 226570 | 42 mm | 12.5 mm | 50.5 mm | 3285 |
| Sky-Dweller 336934 | 42 mm | 14.1 mm | 50 mm | 9002 |
| Air-King 126900 | 40 mm | 11.6 mm | 48 mm | 3230 |
| Explorer 40 224270 | 40 mm | 11.6 mm | 46.5 mm | 3230 |
| Yacht-Master 40 126622 | 40 mm | 11.7 mm | 47–47.3 mm | 3235 |
| Submariner 124060 | 41 mm | 12.2–12.5 mm⚠ | 47.6–48.2 mm | 3230 |
Show 15 more
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Submariner Date 126610LN | 41 mm | 12.2–12.5 mm⚠ | 47.6–48.2 mm | 3235 |
| Yacht-Master 42 (RLX titanium) 226627 | 42 mm | — | — | 3235 |
| Sea-Dweller 126600 | 43 mm | 15 mm | 50.1–51 mm⚠ | 3235 |
| Deepsea 136660 | 44 mm | 17.7 mm | 51.5 mm | 3235 |
| Explorer 36 124270 | 36 mm | 11.5 mm | 44 mm | 3230 |
| Cosmograph Daytona 126500LN | 40 mm | 11.9 mm | 46.5 mm | 4131 |
| Deepsea Challenge 126067 | 50 mm | 23 mm | 61 mm | 3230 |
| Land-Dweller 40 127334 | 40 mm | 9.7 mm | 46.5 mm | 7135 |
| Oyster Perpetual 41 134300 | 41 mm | — | — | 3230 |
| Datejust 41 126334 | 41 mm | 11.9 mm | 46.5–47.5 mm⚠ | 3235 |
| Datejust 36 126200 | 36 mm | 11.5 mm | 44 mm | 3235 |
| Oyster Perpetual 36 126000 | 36 mm | 11.6 mm | 44 mm | 3230 |
| Datejust 36 (fluted bezel) 126234 | 36 mm | 11.5 mm | 44 mm | 3235 |
| Oyster Perpetual 31 277200 | 31 mm | — | — | 2232 |
| Oyster Perpetual 34 124200 | 34 mm | — | — | 2232 |