Omega · LadyMatic

Strap for LadyMatic Co-Axial 34 Red Gold / Diamond / MOP/ Bracelet

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

Lug width20 mm
Case diameter34 mm
Reference425.65.34.20.55.003 (aka: 42565342055003)
FamilyLadyMatic
MovementOmega caliber 8521 hours, minutes, seconds | date | chronometer, co-Axial escapement
Year2013
CaseRed 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 LadyMatic 425.65.34.20.55.003 (aka: 42565342055003)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The LadyMatic 425.65.34.20.55.003 (aka: 42565342055003), seen from the bench

The Omega Ladymatic features the automatic caliber 8521 with Co-Axial escapement and chronometer certification. The movement offers indication of hours, minutes, seconds and date. The reference 425.65.34.20.55.003 is part of the brand's female collection.

Frequently asked questions

What is the exact lug width of the Omega LadyMatic 425.65.34.20.55.003?

The lug width of the LadyMatic 425.65.34.20.55.003 is 20mm. This parameter represents the distance between the case attachment pins and guarantees compatibility with aftermarket straps certified for this measurement. Verify with a digital caliper to exclude measurement tolerances.

Which strap material pairs best with the rose gold of the LadyMatic?

Cognac or dark brown alligator leather is the reference choice, as the natural grain perfectly complements the luminous reflection of 18k rose gold. Shell cordovan offers longevity and an evolving patina over time, while vegetable-tanned calf leather ensures softness and gradual color development during daily wear.

How do you replace the strap on this Omega model?

The LadyMatic 425.65.34.20.55.003 features integrated rose gold lugs. To remove the previous strap, use a spring bar tool to gently compress the attachment pins from one side, extracting the strap with a smooth upward motion. Align the new strap pins with the lug axes and slide until you feel the secure click.

Can I fit an 18mm or 22mm strap on this watch?

No. The 20mm lug width of the 425.65.34.20.55.003 is specific and does not accommodate other dimensions. 18mm or 22mm straps would cause excessive play, risk of detachment, and abnormal stress on the pins. It is essential to always verify 20mm compatibility before purchase.

How long does a leather strap last on an Omega of this category?

A quality leather strap (alligator, cordovan, vegetable-tanned calf) on a wristwatch with daily use has an average lifespan of 4-7 years. Wear accelerates in cases of frequent perspiration or intense sun exposure. The quality of the tanning, leather thickness, and periodic maintenance are determining factors. A NATO strap or FKM rubber strap extends durability to 10+ years with minimal visible wear.

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