Strap for Rolex Datejust 36 116238

The Rolex Datejust 36 ref. 116238 features a 20-millimetre lug width. This measurement refers to the internal distance between the lug shoulders. Accurate measurement is critical for ensuring compatibility with any aftermarket strap, as even a 1-millimetre variance will prevent correct fitting. To verify, use a digital calliper or millimetre ruler, measuring the gap between the inner lug shoulders at the point where the strap sits.

For a Datejust 36 in 18-carat yellow gold, the most suitable materials are alligator for classical formality, shell cordovan for those appreciating patina development over time, and vegetable-tanned calf for a balance between elegance and tactile softness. Alligator with its tight, regular grain complements yellow gold naturally, whilst cordovan develops unparalleled depth of colour over years of wear. For lighter options, vegetable-tanned calf maintains the leather's natural character and ages visibly. Casati Milano provides personalised consultation in-studio to select the leather best suited to your wrist and habits.

The strap is replaced by removing the spring bars that connect the lugs to the watch case. This procedure requires a specific tool: a spring bar removal tool. Consulting a professional watchmaker for this operation is advisable, as incorrect removal may damage the lugs. Should you purchase a strap from Casati Milano, we offer in-studio fitting at our Milan atelier, or we will provide detailed instructions if you prefer to proceed independently. Ensure the spring bars are reinstalled with precision to prevent the strap from not adhering properly to the lugs.

Yes, you may use bespoke aftermarket straps compatible with 20mm lug width, provided the strap is constructed to Rolex standards and the spring bars are suitable for the model. Many collectors prefer bespoke straps because they offer superior materials, customised finishing, and the opportunity to select premium leathers such as alligator, shell cordovan, or vegetable-tanned calf. A high-quality bespoke strap not only enhances overall aesthetics but can extend the wristwatch's versatility across wearing contexts. A bespoke strap warranty typically covers manufacturing defects for 18 months, ensuring a secure purchase.

Leather strap longevity depends on material grade, daily wear, and maintenance routines. Premium-grade alligator lasts 5–7 years with moderate use and regular cleaning, whilst shell cordovan, owing to its inherent density, easily reaches 8–10 years. Vegetable-tanned calf has a lifespan of 4–6 years and ages aesthetically throughout its serviceable life. The natural patina developing over time is desirable for many collectors. To extend strap life, avoid prolonged water immersion, clean regularly with a slightly damp cloth, and store in dry environments away from intense heat sources. A well-maintained strap can be regenerated by an experienced craftsman with a new lining, effectively renewing the product.