Milano Straps
← RolexSearchCart
Menu

Rolex · Datejust 31

Strap for Datejust 31 Yellow Gold Diamond / President / Champagne Roman

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

16mm
16 mm strapsAll Rolex
Lug width16 mm
Case diameter31 mm
Reference178288-0051
FamilyDatejust 31
MovementRolex caliber 2235 Hours, Minutes, Seconds | Date | Chronometer
CaseYellow Gold

Spring bar

Spring bars for Rolex

The right category for this model · choose the 16 mm size

View →

Straps for the Datejust 31 178288-0051

Selected for the 16 mm lug width

All 16 mm straps →

The Datejust 31 178288-0051, seen from the bench

The Rolex Datejust 31 178288-0051 in Yellow Gold represents a balanced timepiece from Swiss manufacture, the feminine evolution of the 1945 original reinterpreted for proportions suitable for smaller wrists. The 31mm Yellow Gold 750 case features a smooth bezel and Cyclops crystal over the date window. The caliber 2235 automatic movement powers hours, minutes, seconds, and an instant-advance date complication. The 16mm lug width ensures refined proportions without the disproportionate strap effect common in ladies' watches.

Frequently asked questions

What is the exact lug width of the Rolex Datejust 31 178288-0051?

The Rolex Datejust 31 reference 178288-0051 features a lug width of 16 millimetres. This measurement is critical when purchasing an aftermarket strap: any larger size (17, 18mm) or smaller size (14, 15mm) would result in misalignment between the spring bars and case. Always verify that your strap has been manufactured specifically for 16mm lugs.

What is the best strap material for the yellow gold Datejust 31?

Alligator represents the most cohesive choice alongside yellow gold: the reptile's geometric grain captures light in a way that complements the metal's warmth. Shell cordovan, with its profound patina that evolves over time, constitutes a more characterful alternative. For a contemporary approach, vegetable-tanned calf leather offers neutral texture and admirable ageing potential. Synthetics and rubber are inadvisable, as they contradict the watch's formal spirit.

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

Strap replacement requires a dedicated spring bar removal tool to compress the elastic pins (spring bars) that anchor the strap to the case lugs. It is not advisable to force with improvised objects, in order to avoid case scratches or component damage. If you lack experience, entrust the operation to a qualified watchmaker or contact Milano Straps for installation during a visit to the Casati Milano atelier.

Is an aftermarket strap truly compatible with the Datejust 31 178288-0051?

Yes, provided the strap has been constructed with specific 16mm lug width attachments and respects Rolex geometry. Milano Straps manufactures bespoke straps certified as compatible with this reference, with extremely tight construction tolerances. Compatibility is never assumed: each strap must be verified millimetrically before delivery.

What is the average lifespan of a leather strap on a Datejust 31?

A natural leather strap, with vegetable or animal tanning (alligator, cordovan), typically lasts 4-7 years under ordinary use. Ageing accelerates in humid environments, with constant sun exposure or if exposed to repeated mechanical stress. A high-quality alligator or cordovan strap, such as those by Milano Straps, maintains structural integrity well beyond this timeframe. Regular maintenance (gentle cleaning, occasional conditioning) significantly extends useful life.

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 →

Casati Milano · Via XX Settembre 15, Milan · by appointment only