Rolex · Datejust 36

Strap for Datejust 36 Rolesor Yellow Domed / Jubilee / Black Computer 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 diameter36 mm
Reference116203-0172
FamilyDatejust 36
MovementRolex caliber 3135 hours, minutes, seconds | chronometer
Year2018
CaseYellow Gold, Stainless Steel

Recommended spring bar

Modern Rolex spring bars 20mm — 1.5mm diameter

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

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Straps for the Datejust 36 116203-0172

Selected for the 20 mm lug width · workshop selection

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The Datejust 36 116203-0172, seen from the bench

The Rolex Datejust 36 Rolesor Yellow model 116203-0172 combines 18-carat yellow gold and AISI 316L stainless steel in a 36mm case, maintaining the classic proportions established by the 1945 original. The 20mm lug width is integrated into the case structure and requires precise strap construction. Powered by the calibre 3135 with a 28,800 vph frequency, Parachrom hairspring, and Breguet balance wheel, it delivers chronometer-certified performance. Water-resistant to 100 metres, the model features a Cyclops lens over the date window and a sealed caseback, embodying aesthetic coherence without sporting compromise.

Frequently asked questions

What is the lug width of the Rolex Datejust 36 reference 116203-0172?

The Rolex Datejust 36 in reference 116203-0172 requires a watch strap with a lug width (ansa measurement) of exactly 20 millimetres. This dimension is specific to the 36mm Datejust case geometry. Always measure from the inner edge of one lug to the inner edge of the other to ensure precise compatibility. A half-millimetre error will compromise the fit and security of the strap.

Which strap material is best suited to the bicolour Datejust 36 gold and steel?

For the yellow gold and stainless steel bicolour 116203-0172, we recommend dark brown alligator (mahogany or deep chestnut) to harmonise with the warm gold tones, or vegetable-tanned calf leather in deep burgundy for elegant contrast. If you prefer minimalist aesthetics, a black crocodile strap reduces visual complexity and lets the case speak. A grey-pearl NATO or caramel calf leather expand your options while maintaining formal coherence.

How do you change the strap on a Datejust 36 reference 116203-0172?

The Datejust 36 employs a deployante (deployment) clasp with spring bar lugs for strap attachment. To change the strap: position the watch face-down, locate the lateral pins (spring bars) linking the lugs to the case, gently lift them using a dedicated pry bar. Remove the old strap by extracting the spring bars. Insert the new strap by threading the spring bars through the eyelet slots, ensuring they lock completely. If you lack experience, consult a professional watchmaker.

Is a high-quality aftermarket strap truly compatible with the 116203-0172?

Yes, provided the lug width is precisely 20mm and the strap is constructed with materials and techniques commensurate with the case's prestige. Artisanal straps from milanostraps.it are verified with digital callipers to guarantee compatibility, and leather is selected and tanned to sartorial standards. An aftermarket strap does not diminish a Rolex case, provided it is executed with meticulous attention to construction detail.

How long does a natural leather strap last on a Rolex Datejust 36?

Lifespan depends on material and daily use. High-quality vegetable-tanned alligator withstands 3-5 years of daily wear before requiring refurbishment. Vegetable-tanned calf lasts 2-4 years, shell cordovan can endure 5-7 years with proper care. Natural rubber resists 1-2 years. Leather ageing is natural and desirable: the patina narrates the story of wear. Protect the strap from excessive moisture and allow air-drying after water exposure.

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