Rolex
Datejust 31 178278-0115— lug 16mm
Rolex Datejust 31 178278-0115: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 16mm lug width to preserve the original sartorial balance."
Technical Specifications
Rolex 178278-0115The essential strap measurement.
Browse 16mm straps →178278-0115
Rolex caliber 2235 Hours, Minutes, Seconds | Date | Chronometer
The Heritage
Compatible Straps
Selected for the 16mm lug width of the Datejust 31
FAQ
What is the lug width of the Rolex Datejust 31 178278-0115?
The lug width (ansa measurement) of the Rolex Datejust 31 reference 178278-0115 is 16 millimetres. This dimension, measured between the inner lug attachments on the case, requires specifically tailored straps. It is not a standardised width in commercial markets, which is why Casati Milano manufactures each strap bespoke to ensure perfect integration with the yellow gold case.
Which strap material is recommended for the Datejust 31 178278-0115?
For this yellow gold model, we recommend alligator with vegetable tanning or vintage calf leather. Alligator delivers formal elegance with consistent texture; vintage calf develops a caramel patina over time, creating remarkable synergy with the case's natural ageing. Shell cordovan is ideal for those seeking a strap with structured body and natural lustre. All these materials harmonise beautifully with the compact case proportions.
How do you change the strap on the Rolex Datejust 31 178278-0115?
The strap is changed using a spring bar removal tool. The procedure requires precision to avoid scratches on the yellow gold case. If you lack experience, we recommend having an authorised Rolex retailer or specialised watchmaker perform the operation. With Casati Milano, we can guide you step-by-step via WhatsApp throughout the entire process.
Are aftermarket straps compatible with the Datejust 31 178278-0115?
Yes, with critical precision: only straps engineered specifically for the 16-millimetre lug width are compatible. Many aftermarket straps are manufactured for 18mm or 20mm widths, creating visible misalignments. Bespoke straps crafted by Casati Milano for 16mm sizing guarantee perfect fit and structural longevity.
What is the lifespan of a leather strap for the Datejust 31 178278-0115?
A high-quality leather strap—alligator, calf, or shell cordovan—typically lasts 4-6 years with proper maintenance (periodic cleaning, protection from excessive moisture). Longevity depends on frequency of wear, climate exposure, and care routines. Casati Milano straps include an 18-month manufacturer's warranty and personalised maintenance guidance, significantly extending the useful life of your strap.
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 →By appointment only · Milan
The atelier's website: casatimilano.com