Omega · LadyMatic
Strap for LadyMatic Co-Axial 34 Yellow Gold / Diamond / MOP / Bracelet
Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
The LadyMatic 425.65.34.20.55.009 (aka: 42565342055009), seen from the bench
Frequently asked questions
What is the correct lug width for the Omega LadyMatic 425.65.34.20.55.009?
The lug width of the LadyMatic 425.65.34.20.55.009 is 18mm. This is the standard distance between the case lugs. This dimension is specific to this model and must be strictly respected to ensure compatibility and correct aesthetics. Do not confuse lug width with case diameter: in this case the case is 34mm, but the lug width is 18mm.
What is the best strap material for a yellow gold LadyMatic?
For a yellow gold LadyMatic, alligator with vegetable tanning is the most natural choice: its regular scales visually complement the luster of gold, and the leather ages beautifully developing rich and noble patinas. Calf leather is a versatile and more practical alternative for daily wear. Shell cordovan offers exceptional density and longevity. For those preferring modernity, cotton NATO or structured rubber create conscious contrast without diminishing the preciousness of the case.
How do you change the strap on an Omega LadyMatic?
The LadyMatic strap is changed using a pin removal tool available from jewelers or online. Position the tool under the metal pin that connects the strap to the case, apply gentle pressure until the pin exits its seat, then remove the old strap. To install the new strap, align the strap holes with the pin seats on the case and reinsert the pins with the same tool. If you are unsure, entrust the task to a professional watchmaker to avoid damage to the case.
Are there aftermarket straps compatible with the 425.65.34.20.55.009?
Yes, any strap with an 18mm lug width is compatible with the LadyMatic 425.65.34.20.55.009. Milanostraps.it offers a complete collection of handcrafted 18mm straps in various materials (alligator, calf, shell cordovan, NATO) and colors, ready to ship. The Casati Milano atelier also creates custom-made straps, allowing you to choose leather, thread color, and personalized initials.
How long does a leather strap last on this watch?
The lifespan of a leather strap depends on use and maintenance. A quality handcrafted strap in alligator or calf leather with vegetable tanning typically lasts between 2 and 5 years of regular daily use before requiring replacement. Decisive factors are exposure to sweat, moisture, and UV rays. Minimal maintenance (occasional cleaning, quick drying after getting wet) significantly extends service life. Natural leather develops character as it ages, and often aesthetic degradation precedes structural failure: when the leather loses elasticity or stitching begins to fail, it is time to replace the strap.
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

