Rolex
Datejust 31 278243-0020— lug 16mm

The Rolex Datejust 31 278243-0020 features a lug width of 16mm, measured internally from one spring bar to the other perpendicular to the lug shoulders. This width is specific to the Datejust 31 and is smaller than the Datejust 36mm (20mm), reflecting the ergonomic proportions of the 31mm case.

For a two-tone Datejust 31 in stainless steel and yellow gold, alligator straps in cognac or toffee brown, or satined calf leather are classical choices. Alligator creates visual continuity that enhances the gold without competing chromatically. For a modern effect, a rubber FKM strap offers practicality while maintaining elegance. Avoid saturated colours (bright red, blue) that create conflicts with the two-tone case.

The Datejust 31 uses standard lateral spring bars with a 16mm lug width. To change the strap, remove the watch from your wrist, position a spring bar tool in the groove of the bar and apply gentle inward pressure to release the ends. Insert the new bar into the lugs and ensure the strap is correctly secured before wearing the watch.

Yes, any strap with a 16mm lug width is compatible with the Datejust 31 278243-0020, provided it meets robust construction standards. Milano Straps offers artisanal straps in alligator, calf leather, vegetable-tanned leather and rubber, all designed to ensure perfect compatibility and longevity. The quality of leather and craftsmanship represents added value over generic straps.

Leather strap longevity depends on material type and usage. A quality alligator or calf leather strap, with proper maintenance (avoiding prolonged moisture and dirt), retains structural integrity for 4-6 years. Vegetable-tanned leather develops patina over time but may last 5-7 years. FKM rubber has superior durability (8+ years). Milano Straps provides an 18-month warranty on manufacturing defects; natural leather wear is not covered.