Omega · Speedmaster (Non-Moonwatch)
Strap for Speedmaster Moonwatch Co-Axial Orange Gold / White
Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Speedmaster (Non-Moonwatch) 311.63.44.51.04.001 (aka: 31163445104001)
Selected for the 21 mm lug width · workshop selection
Matte Black Alligator Strap€195
Matte Dark Gray Alligator Strap€195
Millennium Green Alligator Strap€195
Grey Hammered Leather Strap with Ecru Stitching€98
Hammered Calfskin Strap Light Blue€98
The Speedmaster (Non-Moonwatch) 311.63.44.51.04.001 (aka: 31163445104001), seen from the bench
Frequently asked questions
What is the exact lug width of the Omega Speedmaster (Non-Moonwatch) 311.63.44.51.04.001?
The lug width is 21 mm. This measurement is specific to the 44.25 mm version of the Racing collection. To verify it, measure the distance between the lugs at the position where the strap inserts. All straps for this model must respect this dimension to ensure correct fit and smooth removal.
Which strap material pairs best with the orange gold of the Speedmaster 311.63.44.51.04.001?
Warm cognac-toned alligator is the ideal choice: the natural grain dialogues with the alloy color without aesthetic conflict. Bordeaux shell cordovan offers an alternative chromatic harmony with rich aging. Dark grey NATO maintains freshness and reduces visual weight, while vulcanized rubber allows habitual transformations without structural compromises.
How do you change the strap on an Omega Speedmaster 311.63.44.51.04.001?
The change is simple. Turn the watch over and locate the lugs (the metal cylinders protruding from the sides of the case). Use a spring bar tool (special lever with forked ends) to compress the internal spring of the lug, gently lifting the old strap. Insert the lugs of the new strap in the same position and release the spring. Verify that the strap is well-secured before wearing the watch.
Are there aftermarket straps compatible with the Speedmaster 311.63.44.51.04.001?
Yes. Milano Straps offers a complete collection of artisanal 21 mm straps compatible with this model, available online in various materials (alligator, calf, shell cordovan, NATO, rubber). All are customizable in sizes, initials, and thread color. For a bespoke experience, the Casati Milano atelier creates made-to-measure straps with personal leather selection and 18-month warranty.
How long does a leather strap last on an Omega watch like the Speedmaster 311.63.44.51.04.001?
Durability depends on the material and frequency of use. Artisanal-quality alligator resists 3-4 years of daily wear, developing characteristic patina. Shell cordovan is more resistant, exceeding 4-5 years. Canvas NATO lasts 2-3 years. Periodic maintenance (cleaning, conditioning with specific balms) significantly extends strap life. Milano Straps offers straps with 18-month warranty and availability of structural replacements.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

