Rolex
Day-Date 36 118238-0406— lug 20mm
Rolex Day-Date 36 118238-0406: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Rolex 118238-0406The essential strap measurement.
Browse 20mm straps →118238-0406
Rolex caliber 3155 Hours, Minutes, Seconds | Date, Day | Chronometer
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Day-Date 36
FAQ
What is the lug width of the Rolex Day-Date 36 reference 118238-0406?
The lug width of the Rolex Day-Date 36 118238-0406 is 20 millimetres. This dimension is the factory standard for this model and is measured internally between the two attachment points on the case. Any aftermarket strap must respect this specification precisely to ensure proper seating and maintain the case's water resistance.
What is the best strap material for the Rolex Day-Date 36 in yellow gold?
Alligator leather remains the most aesthetically appropriate choice: its natural grain interacts with gold reflection without visual competition. Vegetable-tanned shell cordovan offers accelerated patina development and unique tactile qualities. Premium calf leather finished in fleur de lis represents the ideal compromise between timeless elegance and daily practicality, particularly when paired with a yellow gold deployante.
How do you change the strap on a Rolex Day-Date 36?
Replacing the lugs on a Day-Date 36 requires specific tools: a quality spring bar extractor tool and an illuminated, protected work surface. The lug pins must be extracted gently, perpendicular to the case, avoiding lateral movements that could damage them. This operation is strongly recommended to be performed by a certified watchmaker or specialist service such as Casati Milano to ensure precision and case integrity.
Is there a compatible aftermarket strap for the Rolex Day-Date 36 118238-0406?
Yes, quality aftermarket straps with 20mm lug width can be successfully paired with the Day-Date 36. Milano Straps offers a collection of artisan-crafted straps in alligator, shell cordovan, calf leather and natural rubber, all available in this dimension. Choosing a bespoke strap from Casati Milano allows you to personally select the leather in the atelier and follow production with an 18-month manufacturing warranty.
How long does a leather strap last on a Rolex Day-Date 36 with daily wear?
The lifespan of a leather strap depends on material quality and usage frequency. First-grade alligator or calf leather, vegetable-tanned and worn daily, maintains structural integrity for 3-5 years. Shell cordovan, owing to its density, can endure 5-7 years. Natural wear produces patina and progressive softening—characteristics prized by collectors. A Casati Milano strap includes an 18-month manufacturing warranty and can be regenerated or replaced at no additional cost upon warranty expiration.
The next step
The right strap isn’t chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →By appointment only · Milan
The atelier's website: casatimilano.com