Strap for Rolex Datejust 179138

The Rolex Datejust 179138 has a lug width of 13mm. This measurement is specific to the 26mm Datejust case and differs from the 17mm of the 31mm variant and the 20mm of the 36mm and 41mm versions. To verify this independently, a digital calliper placed across the inner lug distance will give an accurate reading.

For an 18k yellow gold case such as that of the 179138, a vegetable-tanned alligator strap is the most technically coherent choice: the natural belly texture and the patina that develops over time complement the warmth of the metal beautifully. Shell cordovan in a solid colour is the alternative for those seeking a compact and lustrous surface. In both cases, an 18k yellow gold deployant clasp ensures visual consistency with the case.

Replacing the strap on the 179138 requires a dedicated springbar tool, a double-pronged instrument that compresses the springbars within the lugs without causing damage. Work on a soft surface and avoid forcing the tool to prevent scratches on the gold case. If you are not experienced with this procedure, it is advisable to consult a watchmaker or an authorised Rolex retailer.

Yes. Handcrafted aftermarket straps in 13mm are fully compatible with the Rolex Datejust 179138, provided the lug width is strictly 13mm and the strap ends are shaped to follow the curvature of the Rolex lugs. Milanostraps.it offers a curated selection of artisan straps in various materials, with the option of bespoke shaping through the Casati Milano service.

The longevity of a leather strap depends on the material, frequency of wear and maintenance. A quality vegetable-tanned alligator strap, rotated with other straps, can last between 3 and 7 years whilst retaining a refined appearance. Shell cordovan, owing to the density of the equine fibre, is among the most durable options. Avoid prolonged contact with water and perspiration, and apply a neutral conditioner periodically. Casati Milano offers an 18-month warranty against manufacturing defects.