Technical Archive

Rolex
Datejust 31 178248-0083— lug 16mm

Rolex Datejust 31 178248-0083: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Datejust 31 Yellow Gold Domed / President / Silver Roman

Artisanal Note

"This model requires a precise 16mm lug width to preserve the original sartorial balance."

Technical Specifications

Rolex 178248-0083
Lug Width
16 mm

The essential strap measurement.

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Reference

178248-0083

Movement

Rolex caliber 2235 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Rolex Datejust 31 178248-0083 in 18-carat yellow gold is one of the most recognizable women's timepieces from the Geneva house. Born as a natural evolution of the original 1945 Datejust — the first wristwatch with an instantaneous date change — reference 178248-0083 interprets this heritage in a 31mm case that balances with surgical precision the legibility of the dial and discretion on the wrist. The fluted bezel, a distinctive feature of the Datejust family from its origins, and the original Jubilee bracelet confer immediate recognizability on this piece, never descending into ostentation. It is a watch that speaks the language of time, not of fashion.

The caliber 2235, an automatic mechanical movement developed by Rolex exclusively for the women's models of the manufacture, beats at the heart of this 178248-0083. With Chronometer certification released by the Official Swiss Institute of Quality Control (COSC) and the subsequent Rolex Superlative Chronometer certification — with a tolerance of ±2 seconds/day — the caliber 2235 guarantees precision superior to industry standards. The date module, with its characteristic instantaneous change at midnight, is the fruit of a mechanical tradition that Rolex has refined over decades. The 18-carat yellow gold case, with a diameter of 31mm and water resistance to 100 meters thanks to the Twinlock crown, embodies the philosophy of a maker that never separates aesthetics and function.

The lug width of the Datejust 31 178248-0083 is 16mm: a precise technical dimension, not interchangeable with the 20mm of men's models or the 13mm of more compact timepieces. To verify it without error, simply measure the internal distance between the two lugs at the base of the case with a caliper, or rely on the official Rolex technical sheet. This dimensional specificity is decisive in the choice of strap: an 18mm strap forcibly mounted on a 16mm lug would compromise both the aesthetics and mechanical integrity of the attachments. The 16mm straps compatible and selected by Milano Straps are designed with this exact clearance, guaranteeing a fit free of lateral play.

For a Datejust 31 in yellow gold, the choice of strap material determines the expressive register of the entire pairing. Alligator leather with vegetable tanning, with its raised-scale grain and ability to develop a personal patina over time, is the absolute reference for those seeking continuity with haute horlogerie watchmaking tradition: the natural texture of alligator belly dialogues with the fluted bezel surface in a visually coherent way. Shell cordovan, with its compact surface and characteristic solid sheen, offers instead a highly distinctive alternative for those preferring a more contemporary, less formal yet equally rigorous profile. Smooth box calf leather, with its fine and uniform hand, is the most versatile choice: it adapts equally to professional and evening contexts. For sporting or seaside contexts, a vulcanized rubber strap with satin finishing maintains dial legibility without sacrificing the water resistance guaranteed by the case.

On the chromatic level, the 18-carat yellow gold of the 178248-0083 case offers a naturally warm color palette for pairing. An alligator strap in dark brown or cognac enhances the golden reflections of the case without creating aggressive contrasts, while burgundy leather adds a note of depth suited to evening contexts. For a more decisive and modern contrast, smooth black — in calf or alligator — builds a sharp opposition that highlights the case color. Those preferring a tonal pairing can opt for honey or light tobacco leather: the result is a monochromatic wrist with vintage flavor, particularly effective with champagne or ivory dials. The keeper and buckle — or alternatively a deployante in yellow gold to remain within the material universe of the case — complete the pairing with the same sartorial logic.

A Rolex deserves a strap worthy of it. With Casati Milano you personally select the leather in the Milan atelier, follow every phase of craftsmanship via WhatsApp, and receive your strap with an 18-month warranty against manufacturing defects. A Haute Couture service — by appointment. Or discover right now the compatible 16mm straps available online.

FAQ

What is the lug width of the Rolex Datejust 31 178248-0083?

The Rolex Datejust 31 reference 178248-0083 has a lug width of 16mm. This measurement should be taken with a calliper at the internal distance between the two lugs at the base of the case. It is essential to use straps with an exact 16mm fitting to avoid lateral play or stress on the spring bar holes.

What is the best strap for the Rolex Datejust 31 178248-0083?

For the Datejust 31 178248-0083 in yellow gold, an alligator strap with vegetable tanning in dark brown or cognac is the most coherent choice with the formal and elegant register of the watch. Smooth box calf leather is ideal for versatile everyday wear, while shell cordovan offers a contemporary high-character profile. For sporting contexts, vulcanised rubber is the most functional solution.

How do you change the strap on a Rolex Datejust 31?

The strap on the Rolex Datejust 31 is replaced using a springbar tool with a fine tip. Insert the tip into the lug hole, compress the spring bar and slide the strap out laterally. Care should be taken not to scratch the yellow gold case; it is advisable to work on a soft surface and, if in doubt, to consult a watchmaker or the Casati Milano atelier.

Are there aftermarket straps compatible with the Rolex Datejust 31 178248-0083?

Yes. Aftermarket straps compatible with the Rolex Datejust 31 178248-0083 must have a 16mm fitting and standard spring bars of 1.5mm diameter. Milano Straps offers a selection of handcrafted straps in various materials — alligator, calf leather, shell cordovan, rubber — made specifically for this lug width, with bespoke craftsmanship available at the Casati Milano atelier.

How long does a leather strap last on a Rolex Datejust 31?

The lifespan of a leather strap depends on the material, care and daily use. A quality vegetable-tanned alligator strap, rotated periodically and stored away from moisture and heat sources, retains its aesthetic and structural properties for 3–5 years of regular use. Perspiration and water are the main factors of deterioration: it is advisable not to wear a leather strap in aquatic environments. Milano Straps guarantees its straps for 18 months against manufacturing defects.

The next step

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