Rolex
Datejust 36 116243-0010— lug 20mm

The lug width (ansa width) of the Rolex Datejust 36 reference 116243-0010 is 20mm. This measurement is constant across all modern Datejust 36 models, measured from the inner face of one lug attachment to the other. It is the critical parameter when purchasing an aftermarket strap: precision of ±0.5mm ensures perfect fit without excessive play or friction on the springbars.

For a Datejust 36 in yellow gold and stainless steel, natural alligator with polished back remains the most historically coherent aesthetic choice: it develops a silvery patina with age and requires a gold deployante clasp for visual consistency. Shell cordovan is an elegant alternative for those seeking chromatic depth and rich ageing (ruby-like patina). Vegetable-tanned calf is ideal for daily wear: naturally water-resistant and minimal maintenance. Cordura NATO in fabric is perfect for summer: practical, transparent, does not obscure the beauty of the two-tone case. Choice depends on use context (formal, daily, sport) and desired chromatic effect.

Strap replacement on a Datejust 36 requires no special tools, only gentleness. Position the watch on a soft surface (cloth), identify the two metal pins (springbars) that pass through the case lugs. Using a small lever tool (springbar tool) or a toothpick, gently compress the small internal hook of the pin on the opposite side of the strap: the pin slides out. Repeat for the second pin. Position the new strap, reinsert the pins until click-lock. If inexperienced, entrust the work to a Rolex-certified watchmaker: you will avoid the risk of scratching the case.

Yes, if the lug width is certified 20mm. Compatibility is guaranteed by international standardisation of springbar width (1.8mm) and proportions of the Oyster case lugs. An artisanal 20mm strap (alligator, cordovan, calf, fabric) installs without modification. The only variable is total length: classic Datejust models have standardised strap lengths (approximately 14cm stem side, 10cm clasp side), but always communicate your wrist measurements to the maker to avoid excessive final stitching.

An artisanal leather strap (alligator, cordovan, calf), with daily use and regular maintenance, lasts an average of 4–7 years. Longevity depends on leather quality, tanning method (vegetable-tanned resists humidity and light better), intensity of use and climate. In summer, with frequent perspiration and sea bathing, fibres degrade more rapidly. Ideal maintenance: clean with damp cloth and wine vinegar (neutralises salts), apply beeswax conditioner every 6 months, avoid prolonged direct sunlight. With these precautions, Casati Milano straps—guaranteed 18 months against manufacturing defects—maintain structural integrity beyond 5 years.