Omega · LadyMatic

Strap for LadyMatic Co-Axial 34 White Gold / Pearls and Diamonds

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
Reference425.65.34.20.55.013 (aka: 42565342055013)
FamilyLadyMatic
MovementOmega caliber 8421 hours, minutes, seconds | chronometer, co-Axial escapement
Year2016
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 LadyMatic 425.65.34.20.55.013 (aka: 42565342055013)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The LadyMatic 425.65.34.20.55.013 (aka: 42565342055013), seen from the bench

The Omega Ladymatic is powered by the automatic caliber 8421 with Co-Axial escapement and chronometer certification. The movement offers hours, minutes and seconds indication with the Co-Axial technology that reduces friction between the components. The reference 425.65.34.20.55.013 represents a version of the brand's women's collection.

Frequently asked questions

What is the lug width of the Omega LadyMatic 425.65.34.20.55.013?

The lug width is 20mm, corresponding to the distance between the case lugs. This width is specific to Omega LadyMatic women's models and determines compatibility with aftermarket straps. To verify it, measure the internal distance between the two lugs with a digital caliper.

What is the best strap for the Omega LadyMatic 425.65.34.20.55.013?

For this white gold case, alligator remains the optimal choice: its natural grain elegantly complements the case's prestige. Shell cordovan offers sophisticated dark luster for formal occasions, while smooth calf guarantees daily versatility without aesthetic compromises.

How do you change the strap on the Omega LadyMatic 425.65.34.20.55.013?

The strap is replaced by removing the spring bars that connect the lugs to the case. Using a specific tool (spring bar tool), apply pressure on both sides of the lug to release the pins and detach the old strap. The new strap is inserted by seating the pins in their holes and verifying correct positioning.

Which aftermarket straps are compatible with the 425.65.34.20.55.013?

All straps with 20mm lug width are compatible. Consult Milano Straps' online collection, which offers certified selections for this width in fine leathers (alligator, shell cordovan, calf) customizable in color, thickness, and length.

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

A quality alligator or shell cordovan strap typically lasts 4-6 years with daily wear, varying based on frequency of use and climatic conditions. Casati Milano atelier offers an 18-month warranty on bespoke straps, covering manufacturing defects and premature stitching deterioration.

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