Rolex
Datejust 36 116203-0173— lug 20mm

The lug width of the Rolex Datejust 36 model 116203-0173 is 20 millimetres. This measurement refers to the distance between the two vertical anchor points on the case where the strap is inserted. To verify this correctly, position a digital calliper perpendicular to the lugs, ensuring you measure the internal space rather than the case itself.

For the bicolour Datejust 36 in yellow gold and steel, black alligator represents the classical choice for formal occasions, thanks to its natural ordered grain that enhances the dual metallicity. For versatile daily wear, vegetable-tanned calf offers initial softness and develops patina over time. Those seeking extraordinary durability may select shell cordovan, which achieves an unmatched natural lustre. Regardless of material, a stainless steel deployante ensures practicality and aesthetic coherence.

Changing a Rolex strap requires a springbar removal tool. Position the watch with the lug facing upward, insert the tool into the lateral access hole of the lug and press gently to release the spring pin. Withdraw the pin downward using fine-tipped tweezers and remove it completely. Repeat on the other side. To install the new strap, align the holes to the lugs, insert the pin from one side using the removal tool and secure the opposite end, ensuring the pin is fully seated.

Yes, provided it respects the 20-millimetre lug width. High-quality artisanal aftermarket straps represent an excellent alternative to original Rolex straps, offering variety in materials, colours and finishes. Always verify that the strap is fitted with standard spring bars (1.6 mm diameter) and that the lugs are sufficiently spacious to avoid lateral friction. A poorly proportioned strap can compromise overall aesthetics and cause premature wear of the case lugs.

The lifespan of a leather strap depends on the material, usage and maintenance. A quality artisanal alligator or vegetable-tanned calf, worn daily without prolonged exposure to moisture or perspiration, can last 3-5 years. Shell cordovan, thanks to its dense fibrous structure, can reach 7-10 years. Frequent exposure to water, sweat and UV rays accelerates leather ageing. To extend lifespan, remove the watch during intense physical activity, dry it immediately after water contact and apply protective balm every 6-12 months.