Rolex
Datejust 36 126231-0034— lug 20mm

The Rolex Datejust 36 reference 126231-0034 features a lug width of 20 mm. This measurement is the proportional standard for the 36-millimetre case diameter, calculated from lug to lug, ensuring aesthetic harmony between the timepiece and the strap.

For a two-tone Datejust 126231-0034, subtle brown alligator or vegetable-tanned calf leather represent the most balanced choices. Alligator echoes the reflections of the steel; calf develops natural patina over time. Alternatively, deep black on alligator creates formal severity; antique burgundy converses warmly with rose gold.

The operation requires a spring bar tool, which compresses the spring bar inside the lug. Position the tool in the small lateral hole of the lug, compress gently, extract the bar, and slide off the old strap. Insert the new strap by aligning the holes, reinsert the bar whilst compressing until the click. If uncertain, entrust the operation to an authorised centre.

Yes, provided it respects the 20 mm lug width. Artisanal straps in alligator, shell cordovan, or vegetable-tanned calf from specialised makers are compatible and, if crafted with care, elevate the overall build quality. Always verify exact width before purchase.

A quality vegetable-tanned leather strap lasts approximately 3–4 years with daily wear, developing visible patina within the first year. Shell cordovan, denser, may last 5–6 years. Alligator sits midway. Longevity depends on climate (humidity accelerates wear), frequency of wear, and maintenance (dry after perspiration, avoid stagnant water).