Omega · Speedmaster Moonwatch
Strap for Speedmaster Professional Moonwatch RAID
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 Moonwatch 311.30.42.30.01.007 (aka: 31130423001007)
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€149
Red Alligator Strap Water Resistant€195
Green Rubberized Alligator Strap with Ecru Tribal Stitching€149
Hammered Calfskin Strap Light Blue€98
Vintage Olive Green Calf Leather Watch Strap€80
The Speedmaster Moonwatch 311.30.42.30.01.007 (aka: 31130423001007), seen from the bench
Frequently asked questions
What is the exact lug width of the Omega Speedmaster Moonwatch 311.30.42.30.01.007?
The lug width is 20mm. This dimension is determined by the distance between the two lateral pins of the case where the strap sits. In the Moonwatch this tolerance is critical: a 19mm strap could move laterally, a 21mm strap would not fit correctly into the lugs. Always verify this measurement before purchasing an aftermarket strap.
What is the best strap for the Omega Speedmaster Moonwatch?
There is no absolute 'best' – it depends on the desired aesthetic identity. Alligator with vegetable tanning represents refined luxury; shell cordovan offers visible aging patina; calf guarantees immediate comfort; NATO recalls vintage-sport charm; synthetic rubber maintains the Moonwatch in its pure instrumental dimension. The choice depends on daily use and personal aesthetics.
How to change the strap on the Omega Speedmaster Moonwatch?
The Moonwatch uses lugs with straight spring bars. Obtain a pin removal tool, position it perpendicular to the case, remove the pin from one lug only by pressing gently inward. The internal spring releases the pin and the old strap detaches. Insert the new strap into the lug, reinsert the pin by pressing until you hear the re-engagement click. Repeat on the other side. If unsure, rely on a specialized craftsman.
Are aftermarket straps compatible with the Moonwatch 311.30.42.30.01.007?
Yes, provided they respect the 20mm lug width. Any strap built for 20mm lug width is mechanically compatible. Aesthetic compatibility depends on choice of material and color: alligator, shell cordovan, calf with vegetable finishes, or artisanal NATO dialogue coherently with the Moonwatch's stylistic identity.
How long does a leather strap last on the Omega Speedmaster?
The lifespan of a leather strap depends on material and use. Quality alligator or shell cordovan, with vegetable tanning, lasts 3-5 years of daily wear; calf 2-4 years; synthetic NATO 5-8 years. Leather aging is not deterioration, but patina: the surface develops darker tones and richer texture. Professional warranties (such as Casati Milano's, 18 months) ensure coverage against manufacturing defects.
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

