Strap for Speedmaster Mark 4.5

The lug width of the Speedmaster ST 176.0012 is 20 millimetres. It is measured from the inner edge of one lug to the other, parallel to the case. This width is specific to the generation of Omega watches from the 1970s and allows compatibility with all 20mm straps available in the aftermarket.

The best strap depends on use and personal preferences. For sporty elegance, a dark brown or black alligator strap enhances the character of the case. A vegetable-tanned calf leather develops natural patina over time. A nylon NATO strap guarantees everyday practicality. For maximum versatility, a rubber strap with deployant buckle combines comfort and aesthetics.

The strap of the Speedmaster ST 176.0012 is secured with standard fixed lugs. Obtain a dedicated tool (spring bar tool). Position the thin end under the compression spring of the lug, gently press inward and remove the spring. Repeat from the other lug. Clean the inside of the case and mount the new strap in reverse order. If you are unsure, consult a professional.

Yes, 20mm aftermarket straps are widely available. Milano Straps offers a complete collection of artisanal straps online ready for shipment, with customisation options in sizes, initials and stitching thread. For a bespoke experience, the Casati Milano atelier creates custom straps with personal selection of leathers.

Durability depends on the material and use. A quality calf leather with vegetable tanning lasts 3-5 years with ordinary maintenance. Alligator leather, due to superior structural density, can last 5-7 years. A nylon Cordura NATO strap lasts up to 10 years. The warranty on Casati Milano artisanal straps is 18 months. Regular cleaning and thorough drying after exposure to moisture significantly extend the useful life.