Rolex · Day-Date 36

Strap for Day-Date 36 Everose Fluted / Oyster / Chocolate

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

Lug width20 mm
Case diameter36 mm
Reference118235f-0129
FamilyDay-Date 36
MovementRolex caliber 3155 hours, minutes, seconds | date, day | chronometer
CaseRose Gold

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Straps for the Day-Date 36 118235f-0129

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118235f-0129, seen from the bench

The Day-Date was introduced in 1955 as the first self-winding wristwatch to display the day and date in full. It is powered by the automatic Rolex Caliber 3155 with chronometer certification and indication of hours, minutes, seconds, date, and day. The case measures 36mm with 20mm lugs.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 118235f-0129?

The lug width of the Rolex Day-Date 36 reference 118235f-0129 is 20 millimetres. This measurement represents the distance between the inner points of the two case lugs and is the exclusive standard for this model. Verifying the measurement with a calliper is straightforward: whilst wearing the watch, measure the space between one lug and the other to confirm exactly 20mm. This dimension guarantees complete compatibility with all straps certified for this width.

Which strap is most suitable for the Day-Date 36 118235f-0129?

For the Day-Date 36 in rose gold, alligator remains the choice of excellence: the characteristic grain paired with the precious case creates impeccable aesthetic harmony and guarantees superior durability. Shell cordovan represents the most luxurious alternative, with natural patina that evolves over time. Vegetable-tanned calf offers sophisticated elegance with fascinating ageing. For less formal contexts, a military-style canvas NATO or structured rubber maintain the model in classic-sports register. Final choice depends on daily use and desired colour palette.

How do I change the strap on the Rolex Day-Date 36 118235f-0129?

The procedure requires an appropriate replacement tip (spring bar tool) and precision in movement. Position the watch with the lugs facing towards you, identify the small hole beneath each lug where the fixing spring is housed. Insert the spring bar tool tip gently into the hole to push inward and extract the spring end: the old strap will fall free. Repeat for the other lug. Insert the new strap by aligning the ends to the lugs and pushing until the fixing springs click into position. If uncertain, entrust the task to a professional.

Can I use an aftermarket compatible strap on the Day-Date 36 118235f-0129?

Yes, provided the lug width is exactly 20 millimetres. Quality artisanal straps often prove preferable to the original President bracelet for colour versatility and personalisation. An alligator or shell cordovan strap from a specialist manufacturer guarantees durability comparable to or superior to the original. Always verify that the width is certified for 20mm and that the attachments are compatible with Rolex lugs. Reliable brands ensure constructive reliability without aesthetic compromise.

How long does a leather strap last on the Rolex Day-Date 36 118235f-0129?

Longevity depends on material, frequency of use and maintenance. Superior-quality vegetable-tanned alligator withstands four to six years of daily use before requiring replacement. Shell cordovan, whilst more fragile in humid conditions, can reach five to seven years thanks to leather density. Mid-range calf lasts approximately three to four years. Canvas NATO or structured rubber offer superior longevity (six to eight years) due to material resistance. Conscious maintenance—avoiding excessive moisture, periodic cleaning, application of specific creams—significantly extends the useful life of any leather strap.

The next step

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