Rolex · Day-Date 36

Strap for Day-Date 36 Platinum Domed / President / Silver

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

Lug width20 mm
Case diameter36 mm
Reference118206-0039
FamilyDay-Date 36
MovementRolex caliber 3155 hours, minutes, seconds | date, day | chronometer
CasePlatinum

Recommended spring bar

Spring bars Rolex Daytona 116520 — 20mm steel

Technical match for lug width and diameter · lug 20 mm · Ø 1.5 mm · closed lugs

All Rolex spring barsOpen →

Straps for the Day-Date 36 118206-0039

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Day-Date 36 118206-0039, seen from the bench

The Rolex Day-Date 36 reference 118206-0039 features a 36.00mm platinum 950 case with fluted bezel and Caliber 3155 movement, certified chronometer with day-date complication in 26 languages. Introduced in 1956 as the first wristwatch displaying full day and date, it offers 48-hour power reserve and 100m water resistance via Twinlock crown. The lug width is fixed at 20mm, shared with Submariner, GMT-Master II and Explorer II models, enabling compatibility with numerous aftermarket straps.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 118206-0039?

The lug width of the Rolex Day-Date 36 reference 118206-0039 is 20mm. This measurement is fixed by the geometry of the platinum 950 case and cannot be altered. To confirm the measurement before purchasing an aftermarket strap, use a digital calliper positioned internally between the two lug arms with the original bracelet removed.

What is the best strap for the Rolex Day-Date 36 in platinum?

For a platinum Rolex Day-Date 36, vegetable-tanned alligator leather with a wide grain pattern is the most coherent choice given the formal nature and intrinsic value of the timepiece. Shell cordovan is an equally distinguished alternative for those who prefer a grain-free surface with a more restrained ceremonial appearance. Both options pair ideally with a deployant clasp, which protects the case from scratches caused by a traditional pin buckle.

How do you change the strap on a Rolex Day-Date 36?

To replace the strap on a Rolex Day-Date 36 118206-0039, remove the original bracelet using a dedicated springbar tool to release the 20mm spring bars from the lug holes. Always work on a soft surface to avoid scratching the platinum case. If in doubt, entrust the operation to a watchmaker or the Casati Milano atelier, where the procedure is carried out without risk to the case finish.

Are there aftermarket straps compatible with the Rolex Day-Date 36?

Yes. The Rolex Day-Date 36 with its 20mm lug width is one of the most widely supported references in the quality aftermarket strap segment. Milanostraps.it offers a curated selection of handcrafted straps in alligator, calf leather, shell cordovan and technical materials, all with a standard taper to 16mm or 18mm at the keeper, and with customisable stitching options.

How long does a leather strap last on a Rolex Day-Date 36?

The lifespan of a leather strap depends on the type of hide, frequency of use, and maintenance. A high-quality vegetable-tanned alligator strap, worn in rotation and kept away from direct moisture, will typically retain its structural and aesthetic integrity for 3 to 6 years. Shell cordovan, owing to the dense fibrous structure of the equine corium layer, often lasts considerably longer while developing a distinctive patina over time. Casati Milano straps carry an 18-month manufacturing defect guarantee.

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