Rolex · Sky-Dweller
Strap for Sky-Dweller White Gold / Ivory
Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Sky-Dweller 326939-0001
Selected for the 21 mm lug width · workshop selection
Red Alligator Strap Water Resistant€195
Matte Dark Brown Alligator Strap€195
Matte Grey Alligator Strap€195
Hammered calfskin strap in cuoio€98
Grey Hammered Leather Strap with Ecru Stitching€98
The Sky-Dweller 326939-0001, seen from the bench
Frequently asked questions
What is the lug width of the Rolex Sky-Dweller 326939-0001?
The Rolex Sky-Dweller 326939-0001 features a lug width of 21 millimetres. This measurement is critical for strap selection: any strap with a different lug width will fail to seat properly, either leaving gaps or binding uncomfortably. To verify correct measurement, use a digital calliper positioned between the spring bar attachment points, measuring the internal distance.
Which strap material is most appropriate for the 42mm Sky-Dweller in white gold?
For a 326939-0001 Sky-Dweller in white gold, the finest strap options are niloticus alligator (natural black or medium brown), vegetable-tanned calf, or premium vulcanised rubber. Black alligator represents the classical choice, providing visual contrast with the white gold case whilst enhancing the dark dial. Warm calf leather offers contemporary appeal and develops a personalised patina over time. Rubber is ideal for those utilising the watch in informal or humid environments.
How is the strap changed on a Rolex Sky-Dweller?
Changing a Rolex Sky-Dweller strap requires a spring bar tool—a specialised flathead or forked implement. Position the watch with the case facing upward, locate the lateral attachment pin and insert the tool gently into the groove beneath to compress the internal spring, allowing the pin to disengage. Repeat for both sides. Insert the new strap by aligning its holes with the case lugs and confirm the pin is secured with an audible click.
Is an aftermarket 21mm strap truly compatible with the 326939-0001?
Yes, any 21-millimetre lug width strap is dimensionally compatible. However, aesthetic compatibility depends upon build quality, proportions and finishing. A premium aftermarket strap in alligator or vegetable-tanned calf can equal—or exceed—original Rolex offerings, providing personalisation and added character. Avoid economical synthetic straps that would diminish the value of the white gold case and movement complication.
What is the expected lifespan of a leather strap on a daily-wear Sky-Dweller?
Strap longevity depends upon wear frequency, climate, maintenance and tanning quality. Premium niloticus alligator, worn daily, retains functionality and aesthetics for 3–5 years before visible wear becomes apparent (thinning around buckle attachment). Vegetable-tanned calf, being subject to tannic acid fragility, endures 2–4 years. Prolonged exposure to humidity, tropical climates or perspiration significantly shortens lifespan. With regular care—gentle cleaning, air-drying, temperate storage—longevity may extend by 12–18 months. A leather strap is not a consumable: it is an evolving aesthetic element, developing character and patina, eventually requiring replacement when the spring loses tension or leather becomes dangerously thin.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

