Rolex · Daytona

Strap for Daytona White Gold Sapphire Strap

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
Reference16559saco
FamilyDaytona
MovementRolex caliber 4030 Hours, Minutes, Small Seconds | Chronograph, Column wheel
CaseWhite Gold

Recommended spring bar

Spring bars Rolex Daytona 16528 yellow gold — 20mm

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm · drilled lugs

All Rolex spring barsOpen →

Straps for the Daytona 16559saco

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Daytona 16559saco, seen from the bench

The Daytona reference 16559saco is equipped with the Rolex 4030 caliber with chronograph function and column wheel. The movement offers indication of hours, minutes, small seconds and chronograph. 20mm lugs for the strap.

Frequently asked questions

What is the exact lug width of the Rolex Daytona 16559saco?

The lug width of the Rolex Daytona 16559saco is 20 mm. This measurement is the internal distance between the two lugs of the case and must be verified with a digital calliper to a tolerance of ±0.3 mm. Accurate measurement is essential to ensure that the strap seats without excessive friction or gaps.

What is the best strap material for the Rolex Daytona 16559saco?

For the 16559saco, alligator leather is the most coherent choice: its regular herringbone texture does not visually compete with the restrained geometry of the white gold case. Calf leather is a more practical alternative; shell cordovan is technically noble but risks diverting attention from the luminosity of the white gold. NATO and rubber are not recommended for this formal model.

How do you change the strap on a Rolex Daytona 16559saco?

The strap is changed by removing the spring bar (the elastic spring) that connects the strap to the case lugs. Use a dedicated tool (spring bar tool) to compress the spring and slide the strap out. Insert the new strap by aligning the strap tube with the spring and allow the spring to expand inside. Verify that both sides are securely attached before wearing the watch.

Is a 20mm aftermarket strap compatible with the Daytona 16559saco?

Yes, any strap certified at 20 mm is dimensionally compatible. However, the choice of material and finish affects the final aesthetic. For the 16559saco, we recommend prioritising natural leather and vegetable tanning to achieve visual balance commensurate with the model's heritage and the quality of the white gold case.

How long does a natural leather strap last on a Rolex?

A high-quality artisanal leather strap, if subjected to correct maintenance (gentle cleaning, protection from prolonged moisture, conditioning every 6-12 months), can last 3-5 years in daily use. Vegetable-tanned leather tends to be more durable than chrome-tanned leather because it develops a natural protective patina. Longevity also depends on exposure to perspiration, environment and frequency of use.

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