Rolex
Day-Date 36 118346-0091— lug 20mm

The Rolex Day-Date 36 reference 118346-0091 features a lug width of 20 mm. This is the internal distance between the case lugs where the strap is fitted, and it is the only compatible dimension for this model. To measure the lug width accurately, position a calliper or digital gauge between the upper and lower lugs at the strap seating point.

For the Day-Date 36 in platinum, alligator leather with vegetable tanning is the classical choice: the natural texture of the crocodile complements the matte finish of platinum without competing for light. On a champagne dial, medium-dark brown alligator (cognac shade) creates elegant contrast. Alternatively, shell cordovan offers superior density and develops an ennobled patina over time. French calf with vegetable tanning provides a versatile, practical solution with superior scratch resistance.

The Day-Date 36 strap is secured by two spring bars (pernos de muelle). To remove the strap: 1) position a spring bar remover tool under the case lug toward the spring bar; 2) apply gentle pressure to release the bar from its seating; 3) slide the strap downward. Reverse the procedure to fit the new strap. If you are not experienced, entrust the task to a certified Rolex technician.

Yes, provided the lug width is 20 mm. Compatibility depends exclusively on the lug width specification: the Day-Date 36 118346-0091 accepts any bespoke, industrial, or alternative material strap as long as the lugs measure 20 mm. Artisanal quality (alligator, shell cordovan, vegetable-tanned leather) is recommended to honour the formal nature of a platinum President.

Leather strap longevity depends on material type and maintenance discipline. An alligator or shell cordovan strap with vegetable tanning, worn daily, maintains structural integrity for 4–7 years before requiring finishing renewal (edges, stitching). With regular maintenance (gentle cleaning with soft cloth, avoiding prolonged exposure to perspiration and humidity), lifespan extends considerably. Casati Milano offers an 18-month warranty on production defects and provides strap restoration and repair services.