Strap for Speedmaster Co-Axial 38 Stainless Steel / Diamond / Blue / Strap

The lug width of this model measures 18 millimetres. This is the distance between the metal lugs at the case shoulders, an essential criterion for selecting compatible straps and ensuring stability and comfort on the wrist.

The ideal strap depends on its intended use: vegetable-tanned alligator for formal elegance and natural patina development over time, shell cordovan for superior durability and predictable ageing, rigid calf leather for versatility across different contexts, FKM synthetic rubber for absolute water resistance and sports comfort.

Use a spring bar removal tool to press the lateral spring bar pins on the case and slide the old strap out of the lugs. Insert the new strap by aligning the holes with the case shoulders and release the pins until they click into position. Verify that the strap is positioned symmetrically before wearing the watch.

Any strap with an 18 millimetre lug width is theoretically compatible. The selection includes traditional leathers (alligator, calf, cordovan), technical fabrics (NATO, nylon), synthetic rubbers (FKM). MilanoStraps offers a specialized collection of 18mm straps customizable in leather, colour and stitching thread.

A quality leather strap, with vegetable tanning or shell cordovan, typically lasts 3-5 years of moderate daily wear. Durability depends on frequency of use, exposure to moisture, sun exposure and maintenance frequency. A natural patina extends its aesthetic life, even beyond functional wear. MilanoStraps guarantees 18 months on all straps crafted by the Casati Milano atelier.