Rolex · Day-Date 40

Strap for Day-Date 40 Everose / White - Roman

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
Reference228235-0032
FamilyDay-Date 40
MovementRolex caliber 3255 Hours, Minutes, Seconds | Date, Day | Chronometer
CaseRose Gold

Recommended spring bar

Spring bars Rolex Daytona 116520 — 20mm steel

Technical match for lug width and diameter · lug 20 mm · Ø 1.5 mm · closed lugs

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Straps for the Day-Date 40 228235-0032

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Day-Date 40 228235-0032, seen from the bench

The Day-Date 40 represents the evolution of the classic Rolex timepiece with day and date indication. It is equipped with the automatic Calibre 3255 with chronometer certification, offering hour, minute, second, date, and weekday indication. The 40mm case features 20mm lugs.

Frequently asked questions

What is the exact lug width of the Rolex Day-Date 40 228235-0032?

The lug width (also known as spring bar distance) of the Rolex Day-Date 40 228235-0032 is precisely 20 millimetres. This linear distance between the lateral attachment pins is the proportional standard for wristwatches in this dimensional category. To measure correctly, position a digital calliper parallel to the dial, resting the measurement base on the inner wall of each lug. A 20mm strap will insert into the attachments without lateral play and without excessive resistance.

Which strap material is most suitable for the rose gold of the 228235-0032?

For the rose gold Day-Date 40 228235-0032, we recommend three primary options: alligator in medium brown or ebony for a formal and conservative aesthetic; vegetable-tanned calf leather in natural hide colour, which develops an amber patina over time that harmonises chrommatically with the gold; shell cordovan in walnut, with natural lustre that transforms to deep burgundy and creates an elegant pairing with the precious metal. Avoid synthetic materials, which do not dialogue naturally with the emotional weight of a rose gold case.

How do I change the strap on my Rolex Day-Date 40 228235-0032?

Strap replacement requires a spring bar tool (a specialised instrument for spring removal). Position your watch in a vice or upon a soft cushion. Insert the spring bar tool into the opening of the lateral spring (lug), press gently inward to compress the spring, and translate the tool downward to free the pin. Repeat for the opposite lug. Once both are released, the strap detaches. For installation, compress the spring of the new strap, insert the pin into the lug, and allow the spring to return to position. If you lack experience, entrust the operation to a professional horologist.

Can I wear an aftermarket (non-Rolex original) strap on my Day-Date 40 228235-0032?

Absolutely. An artisanal strap measuring 20mm, crafted from fine leathers such as alligator, calf or shell cordovan, is not only compatible with your timepiece but elevates the daily wearing experience considerably. Rolex itself does not supply leather straps for the modern Day-Date 40; therefore, an artisanal strap created by specialised ateliers such as Casati Milano represents the superior choice for customisation, construction quality, and longevity.

How long does an authentic leather strap like alligator or calf last?

A premium leather strap crafted with vegetable tanning can last between 5 to 10 years with ordinary maintenance (periodic cleaning with a damp cloth, annual conditioning with natural wax, protection from excess humidity). Alligator is more resistant to atmospheric agents compared to calf leather. Shell cordovan, owing to its superior density, can endure 15-20 years if treated with care. Avoid wearing the strap during water immersion or high-contact physical activities. Surface patina and scratching are part of the natural and noble ageing of these materials.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only