Strap for Style 38 Stainless Steel / Yellow Gold / Fluted / Silver-Diamond / Strap

The Tudor Style 12513-0021 is fitted with a 20mm lug width. This measurement is the fundamental parameter for aftermarket strap compatibility. To verify it, measure the outer distance between the two spring bar holes: 20mm is not the most common size in the market, but it grants access to a curated selection of artisanal-quality straps. Milanostraps offers a comprehensive collection of personalised 20mm straps.

The choice depends on intended use. For formal contexts, black or dark brown alligator delivers understated elegance without competing with the dial. For daily versatility with noble ageing, shell cordovan develops natural patina over time. If you seek absolute durability, vegetable-tanned calf combines natural maintenance and structured texture. The 20mm straps available on milanostraps.it are customisable in leather type, colour, and construction details.

Strap replacement requires a spring bar tool and takes seconds. Position the tool into the small lateral slot of the spring bar, apply gentle pressure to release the bar from its seats, and remove the strap. Align the new strap's bars to the lug holes, then push until you hear a seating click. This operation requires no technical expertise. For Casati Milano straps, the atelier offers supervision assistance if you prefer professional oversight.

Entirely compatible. A 20mm aftermarket strap fits the 12513-0021 perfectly due to standardised lug width. The sole variable factor is strap thickness: ensure your new strap has thickness consistent with the caseʼs perceived robustness (not less than 2.8–3.0mm) to maintain original aesthetic proportions. Premium straps from milanostraps guarantee this compliance.

A high-quality natural leather strap (alligatore, cordovan, or vegetable-tanned calf) typically resists between 3–5 years of regular daily use, assuming ordinary maintenance and rotation with other straps. Lifespan depends on frequency of wear, moisture exposure, and care: a strap worn occasionally may last 10 years. The buckle area is the critical wear point. Casati Milano offers 18-month warranty on all custom straps, covering manufacturing defects and materials.