Smartlet One
Smartlet One
One concept. Three different personalities
Rolex GMT-Master II and Apple Watch on the same wrist
Compatibility guide
Rolex GMT-Master II & Apple Watch on the same wrist
Yes. The Rolex GMT-Master II is fully compatible with Smartlet One. All current references (Batman, Pepsi, Root Beer) use a 20mm lug width natively supported by Smartlet. Apple Watch mounts on the inner wrist via the Smartlet module. Both watches run simultaneously with no modification to either piece.
Context
Why GMT-Master II owners wear Apple Watch too
Three time zones, one wrist
The GMT-Master II was built for international travel. The Apple Watch adds world clock complications, flight notifications, and health monitoring to the same wrist.
For frequent travellers, the combination is genuinely functional rather than purely aesthetic. The GMT complication tracks a second time zone mechanically. The Apple Watch handles jet lag alerts, sleep tracking across time zones, and contactless payments at every border. Smartlet makes both permanent fixtures on a single wrist.
Specifications
Is the Rolex GMT-Master II compatible with Smartlet One?
GMT-Master II lug width
20mm Supported
126710BLNR, 126710BLRO, 126711CHNR, 126719BLRO
Apple Watch models
All Series 4 and above
Series 9, Ultra 2, SE, all sizes
Smartlet model
Classic, Shadow or Titanium
From 349 EUR
Daily wear profile
9-12mm on inner wrist
Comparable to standard steel bracelet
Questions
Common questions about wearing a Rolex GMT-Master II and Apple Watch together
Which GMT-Master II references work with Smartlet?
All current GMT-Master II references are compatible: 126710BLNR (Batman), 126710BLRO (Pepsi), 126711CHNR (Root Beer), 126719BLRO (Pepsi White Gold), and 126715CHNR (Root Beer Everose). All use 20mm lug widths natively supported by Smartlet One.
Does wearing both affect travel comfort?
No. The Smartlet strap is designed for all-day wear. The combined height profile adds 9 to 12mm on the inner wrist, comparable to wearing a standard steel bracelet. Most users report no discomfort after an initial adjustment period of one to two days.
Can I use Apple Watch world clock alongside the GMT complication?
Yes. The two watches operate entirely independently. You can display different time zones on the Apple Watch face alongside the GMT-Master II's mechanical second time zone, giving you three time zones on one wrist if needed.
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