Rolex · Datejust 31
Strap for Datejust 31 Rose Gold / Domed / Silver - Diamond / Oyster
Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Datejust 31 278245-0037
Selected for the 16 mm lug width
The Datejust 31 278245-0037, seen from the bench
Frequently asked questions
What is the exact lug width of the Rolex Datejust 31 ref. 278245-0037?
The lug width is 16mm. This measurement is specific to the 31mm case and must be measured between the inner points of the case lugs using a precision ruler. Verifying this measurement is essential before purchasing any aftermarket strap to ensure correct mechanical compatibility.
Which strap material pairs best with the Datejust 31 in Everose?
Natural alligator is the most versatile and elegant choice. The natural grain texture and patina development over time enhance the warm tones of Everose. Shell Cordovan offers superior durability with its own characteristic lustre. For formal contexts, deep brown or black alligator creates impeccable aesthetic balance with the rose gold case.
How do you correctly change the strap on the Datejust 31 278245-0037?
This requires a specific tool (removal tool or lug bar). Place the watch on a soft surface, locate the spring bars connecting the strap to the lugs, and gently push the pin inward from one side to release it. Repeat on the opposite side. To refit, align the new spring bars with the holes and push until they click securely. If unfamiliar with the procedure, consult an authorised Rolex centre or a qualified watchmaker.
Which aftermarket straps are compatible with the Rolex Datejust 31 278245-0037?
All straps with a 16mm lug width are mechanically compatible. The selection available on milanostraps.it features artisanal straps in alligator, shell cordovan, calf leather and rubber, crafted to exacting standards. Each strap is constructed respecting the precise proportions of Rolex lugs, ensuring perfect geometric fit without forcing or mechanical play.
What is the expected lifespan of a leather strap for the Datejust 31?
With ordinary maintenance (periodic cleaning with soft cloth, avoiding prolonged exposure to moisture and direct sunlight), an alligator or shell cordovan strap ensures a lifespan of 5-10 years with regular use. Natural calf leather requires slightly greater care and averages 4-7 years of service life. Vegetable-tanned leather typically ages visually more gracefully, developing character and patina over time. All Casati Milano straps carry an 18-month warranty against manufacturing defects.
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

