Omega · LadyMatic

Strap for LadyMatic Co-Axial 34 Stainless Steel / Diamond / Grey / Bracelet

Takes 14 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width14 mm
Case diameter34 mm
Reference425.35.34.20.56.001 (aka: 42535342056001)
FamilyLadyMatic
MovementOmega caliber 8520 hours, minutes, seconds | date | chronometer, co-Axial escapement
Year2013
CaseStainless Steel

Spring bar

Spring bars for Omega

The right category for this model · choose the 14 mm size

The LadyMatic 425.35.34.20.56.001 (aka: 42535342056001), seen from the bench

The LadyMatic Co-Axial 34 is a women's watch from Omega's LadyMatic collection, featuring a 34mm stainless steel case with reference 425.35.34.20.56.001. It houses the Omega 8520 automatic Co-Axial movement with COSC chronometer certification, ensuring precision between –4 and +6 seconds per day. The grey dial includes hour, minute, second and date indicators. The strap lug width is 14mm, proportioned to the case diameter and typical women's wrist anatomy.

Frequently asked questions

What is the lug width of the Omega LadyMatic 425.35.34.20.56.001?

The lug width of this model is exactly 14mm. This width is proportioned to the 34mm case diameter and the structure of the female wrist. Verify compatibility by measuring the internal distance between the case lugs: it must correspond to 14mm to correctly mount any aftermarket strap.

Which strap is best suited for the steel Omega LadyMatic?

For formal elegance, a black alligator strap is the most sophisticated choice. For daily wear with natural patina, vegetable-tanned calf develops over time, acquiring character. Those seeking versatility may opt for shell cordovan, renowned for durability and chromatic evolution. For sports contexts, a canvas NATO strap maintains proper proportions at 34mm.

How do you change the strap on the LadyMatic 425.35.34.20.56.001?

The strap is replaced by removing the spring bars that connect the lugs to the case. Use a specific tool (spring bar tool) to press the bars from both sides, then remove the old strap. Insert the new strap by aligning the lug holes with the bars, reposition them and verify they are secure. It is advisable to have this operation performed by an expert if you lack experience.

Which aftermarket straps are compatible with this Omega?

Any strap with a lug width of 14mm is compatible. Milano Straps offers a complete collection of 14mm straps made in alligator, calf, shell cordovan, NATO and rubber, customizable in size, initials and stitching thread color. The Casati Milano atelier also creates bespoke models with personal follow-up.

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

Durability depends on leather quality and conditions of use. An alligator or shell cordovan strap with vegetable tanning, if properly maintained, lasts 3-5 years with daily wear. Calf has similar longevity but wears more rapidly in humid conditions. All Milano Straps straps include an 18-month warranty. Regular maintenance (post-rain drying, occasional conditioning) significantly extends durability.

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