Omega · LadyMatic
Strap for LadyMatic Co-Axial 34 Stainless Steel / Brown 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 425.30.34.20.57.004 (aka: 42530342057004)
Selected for the 16 mm lug width
The LadyMatic 425.30.34.20.57.004 (aka: 42530342057004), seen from the bench
Frequently asked questions
What is the lug width of the Omega LadyMatic 425.30.34.20.57.004?
The lug width of the LadyMatic 425.30.34.20.57.004 is 16mm. This measurement is determined by the internal distance between the two watch lugs, measured at 12 and 6 o'clock positions. It is essential to verify this dimension with a digital calliper before purchasing an aftermarket strap to ensure complete compatibility and correct installation in the lug holes.
What strap is best suited for the LadyMatic 425.30.34.20.57.004?
For the LadyMatic 425.30.34.20.57.004, alligator leather is the optimal choice: its regular grain pattern and the patina that develops over time harmonise perfectly with the proportioned 34mm case. Vegetable-tanned calf represents a versatile and practical alternative, ideal for seasonal rotation. Shell cordovan is the choice for those seeking leather that develops pronounced character and amber patina.
How do you change the strap on an Omega LadyMatic 425.30.34.20.57.004?
Changing the strap on the LadyMatic 425.30.34.20.57.004 requires a spring bar tool and appropriate instruments. Position the watch on a soft support, locate the small cavities on the lug shoulders at 12 and 6 o'clock, insert the spring bar tool tip, and with gentle pressure, push the pin outward until it clicks. After removing the old strap, align the new strap holes with the pins and push until the spring bar clicks into the secure position.
Can I use an aftermarket strap with the Omega LadyMatic 425.30.34.20.57.004?
Yes, you can use quality aftermarket straps with the LadyMatic 425.30.34.20.57.004, provided the lug width is exactly 16mm and the strap is crafted from premium materials. Artisanal straps in alligator, vegetable-tanned calf, and shell cordovan represent excellent alternatives to original Omega straps, often at a fraction of the cost. Construction quality is the decisive factor for ensuring durability and compatibility.
What is the lifespan of a leather strap for the Omega LadyMatic?
The lifespan of a leather strap depends on the material and daily use. High-quality calf leather typically lasts approximately 3–5 years with regular wear; alligator, being denser and more compact, can last 5–7 years. Shell cordovan, as the most robust fibre available, can exceed 7–10 years of useful life. Natural wear is visible in flex zones and friction points against the case. Regular maintenance and immediate drying after moisture contact significantly extend strap life.
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

