Rolex
Datejust 31 178279-0006— lug 16mm

The Rolex Datejust 31 ref. 178279-0006 has a lug width of 16mm. This measurement is standard across the entire Datejust 31 family and determines the correct strap width at the case attachment point. Always verify this measurement with a calliper before purchasing any aftermarket strap.

For an 18-carat white gold case in a 31mm diameter, the most suitable materials are alligator in burgundy or midnight blue for formal occasions, vegetable-tanned calf leather for everyday wear, and shell cordovan for those seeking a strap that develops a refined natural patina over time. A deployant clasp is recommended to preserve the strap's integrity during daily use.

The strap on the Datejust 31 is secured to the lugs via 16mm spring bars. Removal requires a dedicated spring bar tool with a forked tip to compress the bar without scratching the white gold lugs. Given the value of the case material, care is strongly advised, or the task should be entrusted to a professional watchmaker or authorised retailer.

Yes, a wide range of quality aftermarket straps are compatible with the Datejust 31, provided they feature a 16mm attachment width. Milano Straps offers a curated selection of handcrafted leather, rubber, and textile straps produced specifically for this lug width, with finishes that complement the aesthetic of a white gold case.

Longevity depends on the material and maintenance. A high-quality alligator or shell cordovan strap, kept away from excessive moisture and treated periodically with appropriate conditioning products, can last between 3 and 7 years in excellent condition. Vegetable-tanned calf leather tends to soften and develop character over time, with an average lifespan of 2 to 4 years depending on frequency of use.