Strap for Datejust 31 Stainless Steel / Oyster / Black - Roman

The lug width of the Rolex Datejust 31 278240-0001 is 16mm. This measurement represents the distance between the spring bar attachment points on the case lugs. To verify it correctly, measure perpendicularly between the two case shoulders at the insertion point. All straps compatible with 16mm lugs are suitable for this model.

For the Datejust 31 278240-0001, straps in crocodile leather, vegetable-tanned calf, or shell cordovan are recommended. Crocodile is the classic choice and complements the stainless steel 904L case naturally; vegetable-tanned calf develops distinctive patina over time; shell cordovan offers superior density and longevity. Your choice depends on intended use and the aesthetic evolution you desire.

Strap replacement requires a spring bar removal tool. Position the watch on a stable surface, insert the tool tip under one spring bar and push gently to release tension. The pin will then slide out freely—remove the old strap. For installation, align the new strap's pin with the 16mm lugs and press until the spring bar seats properly in its groove. Verify the strap sits equidistant on both sides of the case.

Yes, any strap with a 16mm lug width is compatible. High-quality artisanal straps, such as those available on milanostraps.it, are often preferred by enthusiasts because they allow personalisation beyond original Rolex aesthetics whilst maintaining elevated manufacturing standards and ensuring longevity.

Durability depends on material and usage. A quality artisanal vegetable-tanned calf strap, with regular maintenance (periodic cleaning, protection from excessive moisture), can last 4-7 years. Shell cordovan frequently exceeds 10 years. Crocodile typically lasts 5-8 years. Proper air exposure and gentle cleaning with a damp cloth significantly extend longevity.