Strap for Rolex Sky-Dweller 336938

The lug width of the Rolex Sky-Dweller 336938 is 22 millimetres. This measurement corresponds to the distance between the two lugs (attachment points) on the 42-millimetre case. To verify it correctly, position a digital calliper perpendicular to the watch body, between the two lugs. This dimension is essential for purchasing compatible straps online.

High-quality alligator is the most appropriate choice for the 336938, thanks to its natural texture that enhances the blue dial and the patina that evolves over time. Alternatively, vegetable-tanned calf leather or a high-density FKM rubber offer practicality and elegance. We advise against NATO straps for this watch: the sophistication of the Saros movement deserves a more refined and permanent solution.

The strap is changed using a spring bar remover tool. Position yourself at a lug, insert the tool tip into the appropriate cavity under the ansa, apply gentle downward pressure to release the spring bar, then remove the strap. Repeat on the other side. Install the new strap by sliding the bars into the side cavities until they seat properly. If you are not experienced, entrust the task to a specialist atelier such as Casati Milano.

Yes, provided the strap is specifically dimensioned for 22mm lug width and made from quality materials (alligator, calf, FKM rubber). Always verify compatibility with the supplier. We recommend Italian artisanal straps that respect the watch's aesthetic standards, rather than generic off-the-shelf solutions. Casati Milano offers bespoke customisation with an 18-month warranty.

A high-quality alligator or calf strap lasts an average of 3-5 years with daily wear, provided proper maintenance: avoid prolonged moisture, never iron, occasionally clean with a soft cloth. Durability depends on the tanning method (vegetable > synthetic), leather thickness, and usage. An FKM rubber strap, conversely, lasts 5-7 years because it is resistant to moisture and thermal variation. The natural patina that develops in leather is not a defect, but a sign of authenticity and the watch's history.