Omega · LadyMatic
Strap for LadyMatic Co-Axial 34 Stainless Steel / MOP / Bracelet
Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the LadyMatic 425.30.34.20.55.003 (aka: 42530342055003)
Selected for the 16 mm lug width
The LadyMatic 425.30.34.20.55.003 (aka: 42530342055003), seen from the bench
Frequently asked questions
What is the lug width of the Omega LadyMatic 425.30.34.20.55.003?
The lug width is exactly 16mm. It is measured by positioning a caliper between the inner edges of the metal mounting where the watch strap sits. It is essential to verify this dimension before purchasing an aftermarket strap.
What is the best strap material for the LadyMatic 425.30.34.20.55.003?
Natural alligator remains the most balanced choice: the texture of the emerging dermis dialogues perfectly with the steel, while the patina developed over time tells the story of wear with elegance. Vegetable-tanned calf leather is a sophisticated and more informal alternative; FKM rubber is ideal for water activities.
How do you change the strap on this Omega?
The change requires the removal of the spring bars. Position the watch with the lug facing upward, locate the small hole on the inner side of each lug and gently push the pin inward with a dedicated tool. The end of the pin will emerge from the opposite side, allowing you to remove the old strap and insert the new one.
What is the average lifespan of a leather strap for this model?
A quality artisanal alligator strap, with moderate use and appropriate maintenance (periodic cleaning and drying after moisture contact), maintains optimal condition for 3-5 years. The lifespan depends on the intensity of use, exposure to UV rays and environmental humidity. A vegetable-tanned calf leather tends to develop an attractive patina within the first few months of use.
Is the 16mm strap compatible with other Omega watches?
Compatibility depends on the specific lug width of each model. Many 34mm Omega ladies' watches use 16mm, but some ladies' sports models use 18mm or 20mm. Before purchasing, always check the technical reference of your watch and confirm the lug width from the official product sheet.
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

