Strap for Speedmaster 57 Co-Axial Yellow Gold / Rory McIlroy / Bracelet

The lug width is 20 mm. This is the standard construction specification of the Speedmaster '57, compatible with aftermarket straps and bespoke straps of this specific width. Always verify the distance between the internal attachment points of the lugs before purchase.

Natural alligator or cognac and tobacco tones represent the most fitting choice, creating a perfect aesthetic dialogue between leather and yellow gold. Valid alternatives include smooth calf in stone grey and shell cordovan for those desiring greater contrast. For daily practicality, an anthracite grey NATO maintains visual coherence without compromises.

Use a spring bar tool specifically designed for valuable watches: gently insert the flat tip under the spring bar shoulder on one side of the case, apply outward pressure to compress the spring, and slide the strap out of the lug. Repeat on the other side. Install the new strap by reversing the procedure. For high-value watches such as yellow gold Speedmasters, consider having the strap changed at an authorized service center.

Any strap with a declared lug width of 20 mm is compatible. Milanostraps offers a dedicated collection of 20mm straps, all tested on this reference, with customization options for width, stitching, and finishing in alligator, calf, cordovan, and other leather species.

A quality leather strap (alligator, calf, shell cordovan) has an average lifespan of 4-6 years with daily use and regular maintenance. Exposure to moisture, perspiration, and temperature variations shortens its life. A <a href="/pages/termine-glossario/concia-vegetale">vegetable tanned</a> strap ages gradually, developing patina; chrome tanning accelerates degradation. Casati Milano guarantees 18 months on bespoke straps, covering manufacturing defects and normal wear.