Omega · LadyMatic
Strap for LadyMatic Co-Axial 34 Stainless Steel / Red Gold / Brown / 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 425.20.34.20.63.001 (aka: 42520342063001)
Selected for the 16 mm lug width
The LadyMatic 425.20.34.20.63.001 (aka: 42520342063001), seen from the bench
Frequently asked questions
What is the exact lug width of the Omega LadyMatic 425.20.34.20.63.001?
The lug width of the Omega LadyMatic 425.20.34.20.63.001 is 16mm. This is the specific standard for this model and determines compatibility with any third-party strap. To measure correctly, position a ruler between the two lugs on the case where the strap attaches; the internal distance must be exactly 16mm. An incorrect measurement will result in inability to mount the strap or unwanted sliding within the lugs.
Which strap material pairs best with the LadyMatic 425.20.34.20.63.001?
Given the bi-metal construction (rose gold and stainless steel), the LadyMatic 425.20.34.20.63.001 performs best with alligator or crocodile leather straps in shades of brown, black, or burgundy. These materials preserve the case's sophistication without adding weight. For greater versatility, grained calf leather offers a texture that reflects light similarly to the case's satin finish. For an elegant sporty aesthetic, a high-quality silk or cotton NATO strap provides practicality without compromising the model's classical design language.
How do I change the strap on my Omega LadyMatic 425.20.34.20.63.001?
The 425.20.34.20.63.001 features proprietary Omega quick-change lugs requiring a spring-bar removal tool. Position the watch with the strap facing upwards, insert the tool into the small notch on the lug and push gently inward: the quick-change mechanism will release. Repeat for the opposite lug. Your replacement strap must have a 16mm lug width for proper fit. If unfamiliar with this procedure, consult a professional watchmaker to avoid damaging the precious metal lugs.
Is a generic 16mm aftermarket strap compatible with my LadyMatic 425.20.34.20.63.001?
Yes, any strap with a 16mm lug width is technically compatible with the Omega quick-change lugs on the 425.20.34.20.63.001, provided it meets standard manufacturing tolerances. However, Milano Straps produces 16mm straps specifically engineered for the Omega case profile and lug design: this ensures zero lateral play, proportionate stitching to the case dimensions, and structural integrity appropriate to the case's precious materials. Custom-made artisanal straps allow you to select leather type, colour, thread gauge, and even embroidered initials.
What is the typical lifespan of a leather strap for the Omega LadyMatic 425.20.34.20.63.001?
An artisanal leather strap in premium materials (alligator, crocodile, calf) typically lasts 3-5 years under daily wear with proper maintenance. Leather is an organic material that ages naturally through exposure to perspiration, humidity, and UV radiation, developing patina over time. The 425.20.34.20.63.001, being a ladies' watch, typically experiences less extreme stress compared to sports chronographs. To extend strap lifespan, rotate multiple straps and apply a water-repellent treatment every 6-8 months. Milano Straps provides an 18-month warranty on artisanal straps with availability of custom replacements for future upgrades.
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

