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Omega · X-33 / Z-33

Strap for Omega X-33 / Z-33 3990.50.43

The Speedmaster X-33 Titanium / Red Kevlar - Folding Clasp takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Omega
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Lug width20 mm
Case diameter42 mm
Reference3990.50.43 (aka: 39905043)
FamilyX-33 / Z-33
MovementOmega caliber 1666 Hours, Minutes, Small seconds, Additional 24 Hours Hand (adjustable) | Date, Month, Perpetual calendar, Year indicator | Chronograph, Countdown, Flyback, Foudroyante, Rattrapante | Alarm
Year1998 - 2001
CaseTitanium

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

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

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All Omega spring barsOpen →
Speedmaster X-33 Titanium / Red Kevlar - Folding Clasp — watch

Your watch with our straps

X-33 / Z-33 3990.50.43 with Grand Cavalier Leather Strap Orange
X-33 / Z-33 3990.50.43 with Vintage Brown Calfskin Strap — Natural Patina
X-33 / Z-33 3990.50.43 with Brown Italian Leather Strap

Calf, Orange

Grand Cavalier Leather Strap Orange

€120

★ 4.9 · 12

See the strapAll 20 mm straps

1 / 83

Real photos of the strap and the case. No generated images.

What I'm asked about the Omega X-33 / Z-33 3990.50.43

What strap size does the Omega X-33 / Z-33 3990.50.43 take?

The Omega X-33 / Z-33 3990.50.43 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 X-33 / Z-33 3990.50.43 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 X-33 / Z-33 3990.50.43?

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 X-33 / Z-33 3990.50.43?

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.

For changing the strap

Classic Strap and Bracelet Removal Tooltwo-tip spring bar tool→Milano Straps Premium Swiss Standard Watch Bucklestang buckle, steel or PVD→Leather Conditioner Milano Strapsnourishes and protects the strap→Casati Milano Rectangular Epsom Leather Travel Case — Brownfor the watch and spare straps→

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

Updated on · by Antonio Zichichi