Rolex · Datejust 31

Strap for Datejust 31 Rose Gold / Domed / White - Roman / Oyster

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

Lug width16 mm
Case diameter31 mm
Reference278245-0017
FamilyDatejust 31
MovementRolex caliber 2236 hours, minutes, seconds | date | chronometer
Year2019
CaseRose Gold

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Straps for the Datejust 31 278245-0017

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The Datejust 31 278245-0017, seen from the bench

The Rolex Datejust 31mm model 278245-0017 is the midsize variant of the Datejust family, introduced in 1945 as the first automatic date-winding wristwatch. The Everose gold case houses the Rolex Caliber 2236 manufacture movement with a silicon Syloxi balance wheel, offering approximately 55 hours of power reserve and Superlative Chronometer certification with ±2 seconds per day accuracy. Water-resistant to 100 meters, the 31mm case features a domed white dial with Roman numerals and diamond-set bezel, while the 16mm lug width is specific to this size and requires precise verification before purchasing a strap.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 278245-0017?

The Rolex Datejust 31 reference 278245-0017 features a 31mm case with a lug width of 16mm. This measurement is taken with a digital calliper at the internal gap between the two lugs, where the strap inserts into the case. Verifying this dimension before purchasing any aftermarket strap is essential to ensure a correct fit and prevent lateral play.

What is the best strap for the Rolex Datejust 31 278245-0017?

For the Datejust 31 278245-0017 in Everose gold, the most suitable materials are Louisiana alligator in bordeaux or tobacco tones, shell cordovan for a compact and durable texture, and vegetable-tanned calf leather for everyday wear. A deployant clasp in rose gold, coordinated with the case, is the closure that best preserves the strap's geometry over time. The final choice depends on the intended context of use and preferred colour palette.

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

To replace the strap on a Datejust 31, the spring bars connecting the strap to the case lugs must be removed. Insert a fine-tipped spring bar tool into the lateral hole of the lug and compress the bar until it releases. Care should be taken to avoid scratching the Everose gold case: it is advisable to protect the lugs with low-tack adhesive tape, or to entrust the operation to a professional for the first time.

Are there aftermarket straps compatible with the Rolex Datejust 31 278245-0017?

Yes, numerous aftermarket straps are available for the 16mm lug width of the Datejust 31 278245-0017. Milano Straps produces handcrafted straps in alligator, calf leather, shell cordovan and rubber, specifically sized for this measurement. Unlike original Rolex straps, high-end aftermarket options offer greater personalisation in terms of material, colour and clasp type, while maintaining construction standards befitting the watch.

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

The lifespan of a leather strap depends on the material and frequency of use. A quality alligator strap, properly tanned, can last between three and five years with daily wear. Vegetable-tanned calf develops a characteristic patina over time but is more susceptible to moisture. Shell cordovan is the most durable among smooth leathers, owing to the density of its fibre structure. Avoiding prolonged contact with water and perspiration significantly extends strap longevity.

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