Technical Archive

Rolex
Datejust 36 116231-0074— lug 20mm

Rolex Datejust 36 116231-0074: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Datejust 36 Rolesor Everose Fluted / Oyster / Pink Diamonds

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Rolex 116231-0074
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

116231-0074

Movement

Rolex caliber 3135 Hours, Minutes, Seconds | Chronometer

The Heritage

The Datejust 36 represents the evolution of the model introduced by Rolex in 1945, the first self-winding wristwatch with date indication. It houses the automatic Caliber 3135 with chronometer certification and functions for hours, minutes, seconds. The case features 20mm lugs and maintains the classic proportions of the collection.

FAQ

What is the lug width of the Rolex Datejust 36 116231-0074?

The lug width of the Rolex Datejust 36 116231-0074 is 20 millimetres. This measurement refers to the distance between the two horizontal pins that connect the case to the straps. To verify compatibility with aftermarket straps, measure the distance between the pins: it must be exactly 20 millimetres, with a maximum tolerance of ±0.5 millimetres. An incorrect measurement risks uncertain fit and strap wear.

What is the best strap for the Rolex Datejust 36 116231-0074?

The best strap depends on usage and personal preference. For maximum elegance, we recommend alligator in cognac or medium brown tones: its natural texture dialogues perfectly with Everose. For versatility and longevity, vegetable-tanned calf leather in brown or black offers a patina that evolves over time. For casual sporting contexts, a cotton-polyester NATO in navy blue or military green tones. A black FKM rubber strap with deployante is ideal for those seeking practicality without sacrificing elegance.

How do I change the strap on my Rolex Datejust 36 116231-0074?

To change the strap, you have two options: take the watch to an authorised Rolex service centre, or contact a specialist craftsman such as Casati Milano. If you prefer to do it yourself, acquire a spring bar removal tool and follow a simple procedure: insert the tool into the holes at the base of the lug, gently compress the return pin until it springs out, remove the old strap and insert the new one into the pins. Take care not to scratch the case during the operation.

Is an aftermarket strap compatible with my Rolex Datejust 36 116231-0074?

Yes, any aftermarket strap with a 20 millimetre lug width is compatible with the Datejust 36 116231-0074. Always verify that the strap has been constructed for a 20 millimetre lug width, as measurement errors (19 or 21 millimetre straps) will result in poor fit. Artisanal straps such as those from Casati Milano are bespoke and guarantee perfect compatibility and construction quality comparable to original Rolex straps.

How long does a leather strap last on my Rolex Datejust 36 116231-0074?

The lifespan of a leather strap depends on usage, material and care. A quality CITES alligator under moderate use (4 to 6 days per week) lasts an average of 3-5 years before replacement is required. Vegetable-tanned calf leather has a similar lifespan, but ages more gracefully with deeper patina. A cotton-polyester NATO lasts 2-4 years before threads begin to fray. An FKM rubber lasts 3-7 years depending on UV exposure and extreme temperatures. Rotating between multiple straps significantly extends the life of each piece, allowing the leather to 'rest' and maintain better preservation.

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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The atelier's website: casatimilano.com