Omega · LadyMatic

Strap for LadyMatic Co-Axial 34 Stainless Steel / MOP / Bracelet

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 straps All Omega

Lug width20 mm

Case diameter34 mm

Reference425.30.34.20.55.002 (aka: 42530342055002)

FamilyLadyMatic

MovementOmega caliber 8520 hours, minutes, seconds | date | chronometer, co-Axial escapement

Year2016

CaseStainless Steel

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 →

Straps for the LadyMatic 425.30.34.20.55.002 (aka: 42530342055002)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The LadyMatic 425.30.34.20.55.002 (aka: 42530342055002), seen from the bench

The Omega Ladymatic represents the feminine version of the Seamaster Planet Ocean collection, equipped with the 8520 automatic caliber featuring a coaxial escapement and chronometer certification. The movement provides hour, minute, second and date indication. The reference 425.30.34.20.55.002 maintains the advanced technical characteristics of the Geneva house in a reduced format for the female wrist.

Frequently asked questions

What is the lug width of the Omega LadyMatic 425.30.34.20.55.002?

The lug width is 20mm. This measurement corresponds to the distance between the case lugs and determines the compatible strap. It is the precise technical reference for finding replacements for the original integrated bracelet.

What is the best strap for the LadyMatic 425.30.34.20.55.002?

Alligator and vegetable-tanned calf leather are the most consonant choices with the model's aesthetic identity. For the female wrist, we recommend restrained thicknesses (1.4-1.6mm) and neutral colorways—tobacco, black, bordeaux—that do not compete with the delicate geometry of the 34mm case.

How do you change the strap on an Omega LadyMatic with integrated lugs?

Unlike watches with bar attachments, the LadyMatic requires unscrewing the two lateral case attachments (a delicate operation). We recommend entrusting this to a certified watchmaker or the Casati Milano atelier to avoid damage to the steel. The process is not DIY.

Can I use an aftermarket 20mm strap on this model?

Yes, provided the strap is truly 20mm at the attachments and the lug width does not exceed the case shoulder. Always verify internal measurements: some straps, despite being nominally 20mm, feature adapters that alter the geometry.

How long does a leather strap last on a watch worn daily?

An artisanal strap in fine leather, with minimal maintenance (avoiding prolonged moisture, not forcibly bending the lugs), guarantees 3-5 years of daily wear. The Casati Milano atelier offers an 18-month warranty on all personalized 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.

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