Rolex · Sky-Dweller

Strap for Rolex Sky-Dweller 336238

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter42 mm
Reference336238
FamilySky-Dweller
MovementRolex caliber 9002 hours, minutes, seconds, Additional 24 hours Hand (adjustable) | date, annual calendar, month | chronometer

Recommended spring bar

Spring bars Rolex Sky-Dweller 42 — 21mm × 1.5mm

Technical match for lug width and diameter · lug 21 mm · Ø 1.5 mm · closed lugs

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Straps for the Sky-Dweller 336238

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Sky-Dweller 336238, seen from the bench

The Sky-Dweller was introduced in 2012 as a GMT watch with annual calendar. It features the automatic Calibre 9002 with hour, minute, second hands, adjustable 24-hour hand, date, annual calendar, and month indicator. 42mm yellow gold case with 21mm lugs and chronometer certification.

Frequently asked questions

What is the lug width of the Rolex Sky-Dweller 336238?

The lug width of the Rolex Sky-Dweller 336238 is 21 mm. This measurement is specific to this model and determines compatibility with aftermarket straps. Always verify by measuring the space between the two inner lugs with a digital calliper, parallel to the lugs, to ensure precise fitting.

Which strap is best suited for the Rolex Sky-Dweller 336238?

For the 336238, the ideal strap depends on usage context and aesthetic preference. Alligator leather with vegetable tanning offers timeless elegance; shell cordovan guarantees durability and natural patina; vegetable-tanned calf ensures immediate comfort. For sports use, a quality canvas NATO offers versatility. In all cases, the strap must match the proportions of the 42 mm case without weighing down the wrist.

How do you change the strap on a Rolex Sky-Dweller 336238?

Strap removal requires extraction of the spring bars from the lugs. Position the watch on a soft surface; use a dedicated extraction tool (often bifurcated) to gently press the spring bar and slide it outward. Repeat on the other side. Insert the new strap by aligning one end to the lug first, then push the spring bar until it clicks into place. If it is your first time, entrust the task to a professional to avoid damaging the case.

Is a 21 mm aftermarket strap compatible with the 336238?

Yes, provided that the strap is specifically manufactured for 21 mm lug width. Compatibility concerns the width: the strap must fit perfectly between the two lugs without gaps. Specialised brands such as Casati Milano produce bespoke 21 mm straps guaranteed for the Sky-Dweller. Always verify that the supplier explicitly declares compatibility with this reference.

How long does a leather strap last on a Rolex Sky-Dweller?

Durability depends on material and usage. An alligator or cordovan strap well-maintained lasts 3–5 years with daily intense wear; vegetable-tanned calf tends towards 2–3 years. Longevity increases if the strap is rotated regularly (using a reserve), protected from extreme humidity, and from prolonged direct sunlight exposure. Bespoke brands such as Casati Milano offer 18-month warranties against manufacturing defects and can perform lug replacements if needed.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only