Rolex
Day-Date 40 228398TBR-0036— lug 20mm
Rolex Day-Date 40 228398TBR-0036: 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 228398TBR-0036The essential strap measurement.
Browse 20mm straps →228398TBR-0036
Rolex caliber 3255 Hours, Minutes, Seconds | Date, Day | Chronometer
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Day-Date 40
FAQ
What is the exact lug width of the Rolex Day-Date 40 228398TBR-0036?
The lug width of the Day-Date 40 228398TBR-0036 is precisely 20 millimetres. This measurement represents the internal distance between the lugs where the strap attaches to the case. Verification of this specification is essential before purchasing an aftermarket strap, as even minor variations would result in unsightly gaps between the lugs and case or compromised spring bar geometry.
What is the optimal strap material for a Day-Date 40 in yellow gold?
Alligator leather finished with vegetable tanning represents the finest aesthetic choice for the Day-Date 40 in yellow gold: the natural grain visually complements the case lines and develops a patina over time that ages harmoniously with the gold. Alternatively, calf leather offers a smoother surface whilst maintaining superior elasticity, whereas shell cordovan delivers exceptional structural density and moisture absorption for those seeking artisanal durability.
How should the strap be changed on a Rolex Day-Date 40?
The strap is replaced by removing the spring bars that connect through the case lugs. Use a spring bar tool to compress the internal spring mechanism of the bar and extract it, then thread the new strap through the lugs. It is advisable to engage an authorised service centre or trusted watchmaker to prevent case damage during this operation.
Is a 20mm aftermarket strap compatible with the reference 228398TBR-0036?
Yes, a 20mm artisanal strap is fully compatible from a dimensional perspective. Aesthetic compatibility depends on your choice of material and finish: natural alligator, calf, shell cordovan and high-density rubber all pair perfectly with the yellow gold case profile. Compatibility is guaranteed by precise lug width matching and superior construction quality of the spring bar slots.
What is the typical lifespan of a natural leather strap on a Rolex Day-Date 40?
A high-quality artisanal leather strap (alligator, calf, shell cordovan) typically lasts 3-5 years under moderate daily wear. Longevity depends on exposure to humidity, perspiration and ultraviolet radiation. Vegetable tanning naturally develops a protective patina over time that slows ageing. High-density rubber straps maintain structural integrity for 5-7 years. Casati Milano provides an 18-month warranty on manufacturing defects, though preventative care (gentle cleaning, air drying) extends functional lifespan considerably.
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