Omega · LadyMatic

Strap for Ladymatic Co-Axial 34 Yellow Gold / MOP / Bracelet

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width16 mm
Case diameter34 mm
Reference425.60.34.20.55.002 (aka: 42560342055002)
FamilyLadyMatic
MovementOmega caliber 8520 hours, minutes, seconds | date | chronometer, co-Axial escapement
CaseYellow Gold

Spring bar

Spring bars for Omega

The right category for this model · choose the 16 mm size

Straps for the LadyMatic 425.60.34.20.55.002 (aka: 42560342055002)

Selected for the 16 mm lug width

All 16 mm straps →

The LadyMatic 425.60.34.20.55.002 (aka: 42560342055002), seen from the bench

The Omega LadyMatic 425.60.34.20.55.002 is the contemporary evolution of a legendary lineage launched in 1955 as the first automatic ladies' watch from the Swiss manufacture. This yellow gold reference embodies the rare balance between refined feminine proportions and chronometric precision technology, featuring a 34 mm case diameter and the Omega 8520 Co-Axial automatic caliber with patented escapement certified COSC chronometer. The 16 mm lug width is an architectural parameter defining strap compatibility, and the yellow gold 18-karat material develops natural patina over time, distinguishing authentic vintage watches from industrial production.

Frequently asked questions

What is the lug width of the Omega LadyMatic 425.60.34.20.55.002?

The lug width is exactly 16 millimetres. This measurement is the distance between the two case attachment terminals, not the case diameter itself (34 mm). It is essential to measure correctly to avoid incompatibility: straps of 14 mm or 18 mm will not fit this model without compromising the aesthetic appeal and stability of the attachment.

Which strap is best suited for the Omega LadyMatic in yellow gold?

Alligator is the traditional and coherent choice: its fine grain integrates visually well with the delicate proportions of the case. Vegetable-tanned alligator is ideal because it develops a natural patina over time that harmonises with that of yellow gold. Shell cordovan is also excellent for durability and lustre, while vegetable-tanned calf works if in dark tones. Rubber or NATO straps are not recommended, as they are too informal for a jewellery dress watch.

How do you measure lug width to change the strap?

Lug width is measured by taking the horizontal distance between the two case attachment terminals, which is the space where the strap fits. You do not measure either the case diameter or the strap thickness. In the case of the LadyMatic 425.60.34.20.55.002, this distance is 16 mm. A digital calliper is the most precise tool for this measurement.

Can I fit an aftermarket strap to my Omega LadyMatic 425.60.34.20.55.002?

Yes, it is possible to fit quality aftermarket straps, as long as they are manufactured for the 16 mm lug width. Handcrafted natural-tanned leather or shell cordovan straps often offer superior quality compared to original Omega straps, allowing for aesthetic and tactile customisation. It is essential to verify that the strap is made for this specific width to avoid forced adjustments.

How long does a leather strap last on an Omega LadyMatic?

Durability depends on the material and use. A quality alligator strap typically lasts 3-5 years with moderate daily wear; shell cordovan can last 5-7 years thanks to its inherent robustness; vegetable-tanned calf, more delicate, lasts on average 2-4 years. Vegetable-tanned straps develop a natural patina that is aesthetic, not deterioration, so they can be kept longer. Preventive replacement every 4-5 years keeps the watch in optimal condition.

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