Omega · Seamaster
Strap for Seamaster Master Co-Axial 39.5 Olympic Games Gold Canopus / Enamel / Alligator
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Seamaster 522.53.40.20.04.002 (aka: 52253402004002)
Selected for the 20 mm lug width · workshop selection
Military Red Alligator Strap with Blue Stitching€183
Black and Red NATO Strap — Military Heritage€183
Black Crocodile Military Strap with Blue Stitching€183
Black Calfskin NATO Strap 20mm€80
Dark Brown Calfskin Military Strap€80
The Seamaster 522.53.40.20.04.002 (aka: 52253402004002), seen from the bench
Frequently asked questions
What is the lug width of the Omega Seamaster 522.53.40.20.04.002?
The lug width of the Omega Seamaster 522.53.40.20.04.002 is 20 mm. This measurement is the essential parameter for selecting a compatible strap. To verify it, use a digital caliper and measure the internal distance between the two lugs. Milanostraps.it offers a complete collection of 20 mm straps for this model.
Which strap is best for a white gold Omega Seamaster?
For a white gold Seamaster, an alligator strap in brown or black represents the most authoritative choice. Shell cordovan is an excellent alternative for durability and patina development over time. Vegetable-tanned calf offers softness and a refined color evolution. For casual occasions, a black rubber strap maintains sporty elegance.
How do I change the strap on my Omega 522.53.40.20.04.002?
To change the strap, equip yourself with a spring bar tool. Place the watch on a soft cloth, locate the spring bars, insert the tool from the bottom to compress the internal spring and extract the bar. Repeat on the other side. Install the new strap by reversing the procedure. If you lack experience, contact an authorized service center.
Can I use an aftermarket strap compatible with my Seamaster?
Yes, provided the strap has a lug width of 20 mm. Milanostraps.it offers artisanal straps in fine leather and technical rubber, specifically compatible with the 522.53.40.20.04.002. The Casati Milano atelier also creates custom bespoke straps by appointment with personalized selected leather.
How long does a leather strap last on a watch like the Omega Seamaster?
A fine leather strap (alligator, cordovan, vegetable-tanned calf) typically lasts 4-6 years with daily wear, and up to 8-10 years if worn occasionally. Durability depends on exposure to moisture, sweat, and UV rays. A vulcanized rubber strap lasts 5-7 years. Milanostraps.it straps offer an 18-month warranty against manufacturing defects.
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

