Rolex · Sky-Dweller

Strap for Sky-Dweller Everose / Slate / OysterFlex

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
Reference336235-0004 (aka: M336235-0004)
FamilySky-Dweller
MovementRolex caliber 9002 hours, minutes, seconds, Additional 24 hours Hand (adjustable) | date, annual calendar, month | chronometer
Year2023
CaseRose Gold

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 336235-0004 (aka: M336235-0004)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Sky-Dweller 336235-0004 (aka: M336235-0004), seen from the bench

The Rolex Sky-Dweller 336235-0004 is a 42mm rose gold watch introduced in 2012, powered by the proprietary Caliber 9001 movement developed in Geneva and Bienne. It features an annual calendar, 24-hour GMT function, Saros automatic date correction, and a Slate Sundust dial that shifts with light. The 21mm lug width ensures perfect proportions on the case, and the watch offers 100m water resistance. The OysterFlex bracelet combines technical performance with refined aesthetics for professional use.

Frequently asked questions

What is the exact lug width of the Rolex Sky-Dweller 336235-0004?

The lug width of the Rolex Sky-Dweller 336235-0004 is 21 millimetres, measured between the spring bars from inner edge to inner edge. This measurement is specific to the 42mm case and is critical to ensure proper strap seating without anomalous pressure on the spring bar pins.

Which strap is most suitable for the Sky-Dweller 336235-0004 in rose gold?

For a rose gold Sky-Dweller, we recommend African alligator leather with fine grain or shell cordovan: both enhance the precious metal without competing visually. Alligator creates elegant texture with evolving patina; cordovan offers density and subtle light reflection. Avoid overly thick or highly saturated straps that compete with the rose tone.

How do you change the strap on a Rolex Sky-Dweller 336235-0004?

Use a dedicated spring bar tool: position it beneath the lateral spring bar, apply gentle inward pressure to retract the pin, withdraw the old strap. Repeat on the opposite side. Insert the new strap: the spring bar will click into position when the lugs seat fully in the case slots. Verify firm locking on both sides before wearing.

Can I use compatible aftermarket straps with the Sky-Dweller 336235-0004?

Yes, any strap with a 21-millimetre lug width is compatible. However, construction quality and materials must respect the model's standard: prioritise noble leathers (alligator, cordovan, vegetable-tanned calf) over synthetics. MilanoStraps offers artisanal 21mm straps certified for this case.

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

A high-quality leather strap (alligator, shell cordovan) typically lasts 4–6 years with daily wear and regular maintenance. Longevity depends on water exposure, perspiration, direct sunlight and cleaning frequency. Shell cordovan ages more gracefully than alligator in humid climates. We recommend rotating with rubber straps to extend leather lifespan.

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