Omega · Speedmaster Moonwatch
Strap for Omega Speedmaster Moonwatch 310.32.42.50.01.002
The Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Sapphire / Calf takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Recommended spring bar
Straps for the Speedmaster Moonwatch 310.32.42.50.01.002
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★ 4.5 · 4€80
What I'm asked about the Omega Speedmaster Moonwatch 310.32.42.50.01.002
What strap size does the Omega Speedmaster Moonwatch 310.32.42.50.01.002 take?
The Omega Speedmaster Moonwatch 310.32.42.50.01.002 needs 20 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.
Can the strap on the Omega Speedmaster Moonwatch 310.32.42.50.01.002 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Omega Speedmaster Moonwatch 310.32.42.50.01.002?
Yes, in 20 mm leather. On a 42 mm chronograph I like box calf: it holds its shape and carries a substantial case.
Which strap do you recommend for the Omega Speedmaster Moonwatch 310.32.42.50.01.002?
A 20 mm box calf. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
The Speedmaster Moonwatch 310.32.42.50.01.002, seen from the bench
Frequently asked questions
Which strap material is most suitable for this Speedmaster?
For the 310.32.42.50.01.002, three materials are preferred. Alligator leather with vegetable tanning enhances formal elegance without weighing down the wrist; shell cordovan develops a natural patina and longevity exceeding ten years; NATO fabric conveys the Moonwatch's military heritage. The choice depends on use: chronograph for formal occasions on leather, challenge and sports watch on NATO.
Is there a genuine aftermarket strap truly compatible with the 310.32.42.50.01.002?
Yes, provided it is certified for 20mm lug width. Milanostraps.it offers a collection of 20mm straps in vegetable leather, alligator, calf and fabric, with standard spring bars suitable for the Speedmaster. Compatibility is guaranteed by conformity of lug width; however, we recommend selecting straps with thickness consistent with the case profile (3-4mm finished leather) for authentic aesthetic harmony.
How long does a leather strap last on a chronograph like this Speedmaster?
A quality leather strap—made from vegetable-tanned or alligator leather—typically lasts between 4 and 7 years with daily wear, and up to 15 years with occasional use. Longevity depends on UV exposure, ambient humidity, frequency of wear and initial tanning quality. Shell cordovan, thanks to the fibrous structure of the horse's shoulder, reaches even 20 years while maintaining elasticity. Casati Milano straps include an 18-month warranty and professional re-dyeing and stitching service within 5 years of purchase.
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
The atelier's website: casatimilano.com