Strap for Rolex Datejust 31 78275

The lug width of the Rolex Datejust 31 ref. 78275 is 16mm. This dimension is measured between the inner walls of the lugs — the lateral protrusions on the case — and is the fundamental parameter for selecting a compatible strap. Any standard 16mm strap will fit this model perfectly without requiring modifications to the case or lugs.

For a Datejust 31 78275 in rose gold, we recommend straps in black or dark brown alligator, vegetable-tanned calf in Cognac or brown tones, or shell cordovan which develops a natural patina over time. Black alligator creates maximum contrast and formality, whilst Cognac calf amplifies the warm tones of the case creating visual harmony. Rubber and silicone are inadvisable as they diminish the perception of luxury.

The procedure requires a specialised tool: a spring bar removal tool or small flat-head instrument. Position the watch on a soft surface with the case facing downward. Insert the tool gently into the small aperture beneath the lug and apply light lateral pressure to push the spring bar inward. The strap will disengage from one side. Repeat for the opposite side. Reverse the procedure to install the new strap. If uncertain, entrust this operation to a qualified watchmaker.

Yes, provided the lug width is precisely 16mm. Aftermarket straps from artisanal makers are often superior to original Rolex straps in terms of flexibility, comfort and colour options. The finest materials are dyed alligator, vegetable-tanned calf and shell cordovan. Ensure the strap is equipped with an appropriate deployant clasp, preferably in rose gold or stainless steel according to your case metal.

Lifespan depends on leather quality and frequency of wear. A high-quality alligator or shell cordovan strap lasts approximately 3-5 years with daily use. Vegetable-tanned calf typically wears more quickly (2-3 years) but develops an authentic, sought-after patina. Regular maintenance — periodic cleaning and conditioning with appropriate creams every six months — significantly extends durability. Casati Milano straps include an 18-month warranty against manufacturing defects.