Rolex GMT-Master II vs Tudor Black Bay GMT
The Tudor Black Bay GMT has a 2 mm longer lug-to-lug than the Rolex GMT-Master II (50 mm vs 48 mm).
The Tudor Black Bay GMT has a 1 mm larger case than the Rolex GMT-Master II (41 mm vs 40 mm).
The Tudor Black Bay GMT has a 2.4 mm thicker case than the Rolex GMT-Master II (14.6 mm vs 12.2 mm).
On our fit model the Rolex GMT-Master II suits 6.75"–8" wrists and the Tudor Black Bay GMT 7"–8.25", so the Rolex GMT-Master II is the better choice for a smaller wrist.
Lug widths differ (20 mm vs 22 mm), so straps don't swap.
At US retail the Rolex GMT-Master II costs $6,725 more ($12,000 vs $5,275).
On your wrist
Rolex GMT-Master IIIdeal fit
Tudor Black Bay GMTIdeal fit
Side by side
| Rolex GMT-Master II | Tudor Black Bay GMT | |
|---|---|---|
| Reference | 126710BLNR | M79830RB |
| Case diameter | 40 mm | 41 mm |
| Lug-to-lug | 48 mm | 50 mm |
| Thickness | 12.2 mm | 14.6 mm |
| Lug width | 20 mm | 22 mm |
| Water resistance | 100 m | 200 m |
| Movement | Rolex 3285 (automatic) | Tudor MT5652 (automatic) |
| Power reserve | 70 hours | 70 hours |
| Crystal | sapphire | sapphire |
| Style | GMT, Sport | GMT, Dive |
| Retail (US) | $12,000 | $5,275 |