Rolex
Datejust 36 116243-0045— lug 20mm

The lug width (or strap width) of the Rolex Datejust 36 116243-0045 is exactly 20mm. This measurement is taken internally between the two metal pins of the case and determines total compatibility with aftermarket straps. Any strap designed for 20mm lugs will fit perfectly without lateral play or gaps.

For a two-tone Datejust 36 in yellow gold and steel, American alligator in black or burgundy represents the top choice: tight grain, natural water resistance, and patina that improves with time. Calf leather offers chromatic versatility (brown, burgundy, navy), while shell cordovan in vegetable tanning ensures artisanal authenticity and documented longevity. The choice depends on use case: formal for alligator, daily wear for calf or cordovan.

Remove the metal spring bars (tubulars) that connect the strap to the case lugs. Using a spring bar tool or dedicated removal fork, gently press the tubular inward to release it from the lug hole. Once free, the old strap slides away and the new one is inserted following the same procedure in reverse. A straightforward operation requiring no watchmaking expertise.

Yes, completely. A 20mm aftermarket strap constructed to international watchmaking standards fits the 116243-0045 perfectly. The only variable is build quality, leather type, buckle design, and artisanal level. Choosing a specialist maker like Casati Milano guarantees precise tolerances and premium materials equivalent to the original Rolex strap.

Durability depends on material and usage. High-quality alligator lasts 7–10 years under normal conditions. Well-tanned calf leather resists 5–8 years. Shell cordovan in vegetable tanning, if properly maintained, can reach 12–15 years. Factors like wrist moisture, sun exposure, water and soap contact accelerate ageing. Regular maintenance (soft cleaning, watch-specific leather balms) extends useful life significantly.