Rolex · Datejust II

Strap for Datejust II White

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter41 mm
Reference116300-0003
FamilyDatejust II
MovementRolex caliber 3136 Hours, Minutes, Seconds | Date | Chronometer
CaseStainless Steel

Recommended spring bar

Spring bars modern Rolex 21mm × 1.5mm

Technical match for lug width and diameter · lug 21 mm · Ø 1.5 mm · closed lugs

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Straps for the Datejust II 116300-0003

Selected for the 21 mm lug width · workshop selection

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The Datejust II 116300-0003, seen from the bench

The Datejust II represents the evolution of the classic Datejust with increased dimensions compared to the original model. It features the automatic 3136 caliber with chronometer certification and date indication. The case has 21mm lugs for the strap or bracelet.

Frequently asked questions

What is the lug width of the Rolex Datejust II 116300-0003?

The lug width of the Rolex Datejust II 116300-0003 is 21mm. This measurement represents the distance between the two inner lugs (pins) on the case and is specific to the 41mm model. Precise measurement requires a digital calliper positioned parallel to the dial between the anchor eyelets. Even minor variations (0.5mm) can compromise correct strap insertion.

Which leather strap do you recommend for the 116300-0003?

For the 41mm Datejust II in stainless steel, we recommend cognac-brown alligator with vegetable tanning for timeless elegance, polished black calf for formal occasions, or aged burgundy shell cordovan for daily versatility and water resistance. Alligator develops natural patina over time, calf offers fine and uniform grain, cordovan is virtually waterproof and does not stiffen in cold. Each material dialogues differently with the silvered dial and 316L stainless steel case.

How do I change the strap on the Rolex Datejust II 116300-0003?

The proprietary Rolex release system uses conical pins that lock into the strap eyelets. Press both side buttons beneath the case simultaneously (inward) to extract the pins: the strap will release. Insert the new strap, ensuring the conical pins engage perfectly in the eyelets until you hear the locking click. This operation requires patience and a steady hand—if inexperienced, entrust the task to a certified watchmaker.

Can I use an aftermarket strap on my 116300-0003?

Yes, provided it is constructed with precisely 21mm lug width and compatible with the Rolex release system (conical eyelets). A quality artisanal strap—in alligator, calf, shell cordovan or NATO—with a stainless steel deployante buckle offers superior personalisation and often durability equal to the original. Specialist craftsmen (such as Casati Milano) build straps that respect Rolex tolerances and develop patina over time, something factory straps do not always permit.

How long does a leather strap last on a daily-worn watch?

Longevity depends on material and wear intensity. Quality alligator or calf, with vegetable tanning, typically lasts 4-6 years of intense daily use before requiring reconditioning (professional cleaning, finish regeneration). Shell cordovan, thanks to its natural fibrous structure and high oil content, resists 6-8 years without structural failure. Critical factors: exposure to chlorinated water, acidic perspiration, direct sunlight and humidity. A well-constructed strap with coherent grain and manual finishes ages better than an industrial one: every mark is part of its history.

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