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 425.30.34.20.55.001 (aka: 42530342055001)
Selected for the 16 mm lug width
The LadyMatic 425.30.34.20.55.001 (aka: 42530342055001), seen from the bench
Frequently asked questions
What is the lug width of the Omega LadyMatic 425.30.34.20.55.001?
The lug width of the LadyMatic 425.30.34.20.55.001 is exactly 16mm. This measurement represents the distance between the spring bar pins on which the strap is mounted. It is essential to measure correctly from the inner edge to the inner edge of the spring bars using a digital caliper to ensure compatibility with aftermarket straps.
What is the best strap for the Omega LadyMatic 425.30.34.20.55.001?
For the reduced proportions of this 34mm model, African alligator with fine grain represents the choice most consistent with the original stylistic identity. Recommended thicknesses between 1.2mm and 1.4mm. Valid alternatives include vegetable-tanned calf (which ages elegantly) and shell cordovan for those seeking maximum durability. Avoid thicknesses exceeding 1.5mm to prevent visually overloading the timepiece.
How do I change the strap on my Omega LadyMatic 425.30.34.20.55.001?
The strap is replaced by opening the two spring bars on the sides of the case using a dedicated spring bar removal tool. Gently press the pin inward to release the strap, then extract it completely. Insert the new strap by aligning it with the holes and reposition the pin. If you are not experienced, we recommend entrusting the operation to an authorized watchmaking workshop to avoid damaging the case.
Which aftermarket straps are compatible with the LadyMatic 425.30.34.20.55.001?
All straps with a 16mm lug width are compatible with this model. Milano Straps offers a complete collection of artisanal straps in various leathers (alligator, calf, shell cordovan) and fabrics, customizable in color, initials, and stitching type. The warranty on Casati Milano custom straps is 18 months.
How long does a leather strap last on the Omega LadyMatic 425.30.34.20.55.001?
The lifespan depends on the material chosen and frequency of use. An artisanal quality strap in calf or alligator, with vegetable tanning, lasts an average of 3-5 years with daily use, while developing a natural patina that increases its aesthetic value. Shell cordovan, being more resistant, easily reaches 6-7 years. Regular maintenance (gentle cleaning and conditioning with natural oils) significantly extends longevity.
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

