Omega · Speedmaster Broad Arrow

Strap for Speedmaster Broad Arrow White Gold / Silver

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter42 mm
Reference3652.30.31 (aka: 36523031)
FamilySpeedmaster Broad Arrow
MovementOmega caliber 3303 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel
CaseWhite Gold

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Speedmaster Broad Arrow 3652.30.31 (aka: 36523031)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Speedmaster Broad Arrow 3652.30.31 (aka: 36523031), seen from the bench

The Speedmaster Broad Arrow 3652.30.31 is a chronograph by Omega featuring a 42mm white gold case with a hand-wound Caliber 3303 movement. The model displays hours, minutes, small seconds, date, and chronograph functions on a satin dial distinguished by broad arrow hands. The 20mm lug width is specifically calibrated for this case size to maintain optimal visual proportions. This reference represents a rare evolution of the legendary Speedmaster line, combining mechanical precision with refined design.

Frequently asked questions

What is the lug width of the Omega Speedmaster Broad Arrow 3652.30.31?

The Omega Speedmaster Broad Arrow 3652.30.31 is equipped with a lug width of exactly 20mm. This measurement is specific to this reference and ensures correct optical proportions between the 42mm case and the strap. You can verify it by measuring the distance between the two spring bars or the internal width of the lug on the case itself.

What is the best strap for the Speedmaster Broad Arrow 3652.30.31 in white gold?

For a Broad Arrow in white gold, alligator in dark shades (black, dark brown, burgundy) is the canonical choice. The geometric grain and smooth texture of alligator create a refined contrast with the brilliance of gold. Vegetable-tanned calf is an intimate alternative that develops a natural patina with age. For sports contexts, an FKM rubber strap maintains coherence with the original chronograph DNA.

How do I change the strap on my Omega Speedmaster Broad Arrow?

The Broad Arrow uses standard 20mm spring bars. To change the strap, procure a spring bar tool and a soft surface (mouse pad). Position a spring bar against the tool, apply steady pressure until the bar retracts, remove the old strap, then insert the new one by aligning it to the holes and allowing the spring bar to reposition naturally. Avoid sharp blows to prevent damaging the case.

Can I fit an aftermarket strap on this model?

Yes, the 3652.30.31 accepts any strap designed for 20mm lugs, whether from other brands or specialist artisans. Always ensure the strap is correctly dimensioned for 20mm and that the spring bar shoulders do not protrude excessively from the case. Artisanal straps often offer superior construction quality compared to OEM products and the possibility of customization (initials, color, stitching thread).

How long does a leather strap last before needing replacement?

A quality artisanal leather strap typically lasts 3–5 years under moderate daily use, with extended durability of 7–10 years with mindful maintenance. Longevity depends on the tannage (vegetable-tanned is more robust than aniline), ambient humidity, and regular care practices. Vegetable-tanned leather develops a fascinating patina over the years, while alligator maintains prolonged structural stability thanks to material density. Avoid prolonged water immersion and always dry the strap after accidental exposure.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only