Technical Archive

Rolex
Datejust 36 116243-0075— lug 20mm

Rolex Datejust 36 116243-0075: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Datejust 36 Rolesor Yellow Diamond / Jubilee / Bronze Arabic

Artisanal Note

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

Technical Specifications

Rolex 116243-0075
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

116243-0075

Movement

Rolex caliber 3135 Hours, Minutes, Seconds | Chronometer

The Heritage

The Datejust represents one of Rolex's historic models, introduced in 1945 as the first automatic watch with date indication. The reference 116243-0075 is equipped with the automatic caliber 3135, officially certified as a chronometer. 36mm case with 20mm lugs, featuring hour, minute, seconds and date functions.

FAQ

What is the lug width of the Rolex Datejust 36 reference 116243-0075?

The lug width (also known as strap width or lug distance) of the Rolex Datejust 36 116243-0075 is exactly 20 millimetres. This dimension is the standard for elegant sport watches of the 1990s era and represents the ideal basis for high-quality aftermarket straps. Precision in measurement is essential: even a minor deviation prevents correct strap installation between the case lugs.

What is the best strap for a Rolex Datejust 36 116243-0075?

For the two-tone Datejust 36 in yellow gold and steel, we recommend straps in crocodile alligator with vegetable tanning, or Hermès satin calf leather. Alligator creates visual continuity with yellow gold through its natural grain texture, while calf offers versatile elegance. For daily wear, textile NATO straps in neutral tones ensure practicality without aesthetic compromise.

How do you change the strap on a Rolex Datejust 36?

Strap replacement is performed by removing the two spring bars that hold the strap to the case lugs. Use a dedicated strap removal tool for watches, applying gentle lateral pressure. Measure the lug width beforehand to verify compatibility (20 mm in the case of the 116243-0075). If uncertain, entrust the operation to a professional watchmaker or the Casati Milano service.

What is the lifespan of a leather strap on a Rolex Datejust 36?

A premium leather strap—alligator, calf, or shell cordovan—typically lasts 5 to 7 years when rotated regularly (not worn daily) and maintained with basic humidity protection. Daily and continuous use in high-humidity environments reduces lifespan to 3 to 5 years. Leather gradually fractures in the keeper and buckle area, zones subject to greatest mechanical stress.

Is an aftermarket strap compatible with the Rolex Datejust 36 116243-0075?

Yes, provided the lug width is respected: exactly 20 millimetres. Aftermarket straps of artisanal quality guarantee total compatibility and often superior aesthetic customisation compared to the original Rolex strap. Entrust selection and installation to specialists such as Casati Milano, who will verify precision of tolerances and stylistic coherence with your timepiece.

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.

Request an appointment →

By appointment only · Milan

The atelier's website: casatimilano.com