Rolex · Pearlmaster

Strap for Rolex Pearlmaster 81318

Takes 17 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width17 mm
Case diameter34 mm
Reference81318
FamilyPearlmaster
MovementRolex caliber 2235 Hours, Minutes, Seconds | Date | Chronometer

Recommended spring bar

Vintage Rolex Bubbleback spring bars — narrow lugs

Technical match for lug width and diameter · lug 17 mm · Ø 1.5 mm

All Rolex spring barsOpen →

The Pearlmaster 81318, seen from the bench

The Pearlmaster reference 81318 features a 34mm yellow gold case with 17mm lugs. It is powered by the Rolex 2235 automatic movement, certified as a chronometer, with hour, minute, second and date functions. The movement offers a power reserve of around 48 hours with a Paraflex shock-absorbing system.

Frequently asked questions

What is the exact lug width of the Rolex Pearlmaster 81318?

The lug width of the Rolex Pearlmaster 81318 is precisely 17 millimetres. This dimension is proprietary to the Pearlmaster family and derives from the 34mm case diameter, specifically conceived for the proportions of Rolex's luxury ladies' watchmaking. Any compatible strap or bracelet must adhere to this specification exactly.

What is the best strap for the Rolex Pearlmaster 81318?

The ideal strap for this model is alligator leather in deep cognac or chocolate brown tones, which harmonises with the 18-carat yellow gold case and amplifies its warmth. Alternatively, shell cordovan in burgundy offers superior durability and develops a natural lustre over time. For those preferring softness, smooth calf leather in dark brown is excellent, though it requires more careful maintenance than alligator.

How do you change the strap on a Rolex Pearlmaster 81318?

Changing the strap requires a dedicated tool (spring bar tool) to compress and remove the elastic pins that secure the strap to the case lugs. Position the watch on a stable surface, locate the small lateral grooves of the lugs, insert the tool gently and compress the spring pin until the strap releases. The process is reversible and requires no jeweller intervention, though it is advisable to perform it over soft fabric to avoid accidental scratches.

Can you use an aftermarket (non-Rolex) strap on the Pearlmaster 81318?

Yes, any strap manufactured to 17mm lug width is mechanically compatible. However, given the construction excellence and value of the model, it is strongly recommended to select a strap of equivalent artisanal quality—natural leather in alligator, shell cordovan or precious calf, noble metal fittings. A mediocre strap undermines the aesthetic potential of a jewellery-grade timepiece.

How long does a natural leather strap last on a Pearlmaster 81318?

Longevity depends on frequency of use, leather type and maintenance conditions. Artisanal-quality alligator lasts approximately 4-7 years with daily use, developing patina and natural creasing that enhance its appeal. Shell cordovan is more resistant (8-12 years), whilst smooth calf requires greater care and typically lasts 3-5 years. Rotating multiple straps significantly extends the life of each, allowing the material to dry completely between wearings.

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