Omega · Speedmaster Moonwatch
Strap for Speedmaster Professional Moonwatch Apollo XIII 25th White
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 Speedmaster Moonwatch 3595.52.00 W
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€149
Red Alligator Strap Water Resistant€195
Green Rubberized Alligator Strap with Ecru Tribal Stitching€149
Hammered Calfskin Strap Light Blue€98
Vintage Olive Green Calf Leather Watch Strap€80
The Speedmaster Moonwatch 3595.52.00 W, seen from the bench
Frequently asked questions
What is the lug width of the Omega Speedmaster Moonwatch 3595.52.00 W?
The lug width of the Speedmaster Moonwatch 3595.52.00 W is 20 millimetres. This width should be measured from the inner part of the spring bar housing: two parallel marks separated by exactly twenty millimetres. Do not measure from the outer casing (which varies with wear) or from the spring bars themselves. A 19mm strap will have play, and a 21mm strap will bind during insertion.
Which strap material is most suitable for the Speedmaster Moonwatch 3595.52.00 W?
For the Moonwatch in stainless steel, vegetable-tanned alligator is the choice of aesthetic and historical coherence: the characteristic grain of the leather naturally complements the vintage style of the model. Calf leather and shell cordovan offer elegant alternatives. Reinforced fabric NATO with stainless steel deployant clasp is ideal for sporting activities and humid environments, maintaining the visual authenticity of the chronograph.
How do you change the strap on a watch with 20mm lugs?
To change the strap: (1) position the watch on a soft surface; (2) insert a thin tool (spring bar tool or toothpick) into the small hole of the spring bar housing, perpendicular to the watch; (3) push gently until the spring bar exits the other side; (4) remove the spring bar completely; (5) remove the old strap; (6) insert the new strap and reinsert the spring bar by pushing until it clicks into place. Repeat for the second side.
Are there aftermarket straps compatible with the 3595.52.00 W?
Yes. Any strap with a lug width of 20 millimetres is compatible with the Speedmaster Moonwatch 3595.52.00 W. On milanostraps.it you will find a dedicated collection of 20mm straps in various materials (alligator, calf, NATO, rubber) ready for dispatch, with customization options in sizes, initials and choice of stitching thread.
How long does a leather strap last on a sports watch like the Speedmaster?
The lifespan of a leather strap depends on use, care and material. With regular use (not daily), a high-quality artisanal alligator or calf strap lasts 3-5 years before requiring replacement. Shell cordovan can last 5-7 years thanks to superior fibre density. Rotation with other straps extends the life of each individual piece. Frequent water exposure shortens durability; storage in a dry, cool environment prolongs it. Casati Milano guarantees 18 months on made-to-measure straps.
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

