Omega · Speedmaster First Omega in Space
Strap for Speedmaster First Omega in Space Sedna Gold
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Speedmaster First Omega in Space 311.63.40.30.02.001 (aka: 31163403002001)
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
Matte Blue Alligator Strap€270
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
The Speedmaster First Omega in Space 311.63.40.30.02.001 (aka: 31163403002001), seen from the bench
Frequently asked questions
What is the lug width of the Omega Speedmaster First Omega in Space 311.63.40.30.02.001?
The lug width of the Speedmaster First Omega in Space 311.63.40.30.02.001 is 20mm. This is the distance between the two internal points where the strap inserts into the case lugs. On milanostraps.it you will find the complete collection of 20mm compatible straps, with customization options in length, color, and stitching thread.
What is the best strap for the Omega Speedmaster First Omega in Space in Sedna Gold?
For Sedna Gold, we recommend tobacco or cognac brown alligator: the regular fine grain texture amplifies the case's preciousness without competing chromatically. Alternatively, warm beige vegetable-tanned calf creates elegant contrast allowing the Sedna to emerge. Shell cordovan is not recommended due to its mirror finish that would compete with the rose gold.
How do you measure the lug width to change the strap?
Lug width measurement is performed by positioning a digital caliper between the two internal points where the strap inserts (the attachments to the case lugs). For the Speedmaster First Omega in Space 311.63.40.30.02.001, the distance will be exactly 20mm. It is important not to confuse this measurement with the case diameter (39.70mm) or the total width of the worn strap.
Which aftermarket straps are compatible with this Speedmaster?
All straps with 20mm lug width are compatible with the Omega Speedmaster First Omega in Space 311.63.40.30.02.001. On milanostraps.it the complete collection of 20mm straps includes alligator, vegetable-tanned calf, NATO, FKM rubber, and shell cordovan, customizable in length and finishes. Each strap is available with deployant clasp in titanium or satin steel.
How long does a leather strap last for this Speedmaster?
An alligator or calf strap of artisanal quality, like those from milanostraps.it and Casati Milano, has an estimated lifespan of 5-7 years with regular use. Longevity depends on frequency of use, exposure to water and sweat, and maintenance. Vegetable-tanned calf develops natural patina over time, improving aesthetically. Casati Milano offers an 18-month warranty on made-to-measure straps, with the possibility of periodic reconditioning.
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

