Omega · Speedmaster Reduced
Strap for Speedmaster Reduced Stainless Steel / Yellow / Bracelet / Schumacher
Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Speedmaster Reduced 3510.12.00 (aka: 35101200)
Selected for the 18 mm lug width
Vintage Brown Calfskin Strap — Natural Patina€98
Hammered Pink Strap with Ecru Stitching€98
Hammered Yellow Strap with Ecru Stitching€98
Grey Hammered Leather Strap with Ecru Stitching€98
Swift Red Leather Strap€120
Hammered calfskin strap in cuoio€98
The Speedmaster Reduced 3510.12.00 (aka: 35101200), seen from the bench
Frequently asked questions
What is the lug width of the Omega Speedmaster Reduced 3510.12.00?
The lug width of the Speedmaster Reduced 3510.12.00 is 18mm. This width is specific to the Reduced model and differentiates it from the Professional: it allows optimal proportionality on the 39mm case, avoiding a bulky appearance. Always verify by measuring the gap between the two spring bar holes at the center of the bar.
What is the best strap for the Speedmaster Reduced 3510.12.00?
The Reduced accepts straps in alligator with natural texture (everyday elegance), hammer-grained calf (sporty style), and shell cordovan (patina that evolves over time). For timed use or humid environments, vulcanized rubber maintains the original sporty aesthetic. The choice depends on the occasion: an amber brown alligator for the office, a bordeaux calf for the evening, a black rubber for sport.
How do you change the strap on the Speedmaster Reduced 3510.12.00?
Use a dedicated spring bar tool to remove the lugs, or visit a watchmaker: insert the tool tip under the spring bar support towards the inside of the case, gently push until the spring retracts, then extract the bar from the case holes. Reverse the procedure to mount the new strap. Avoid violent lateral movements that could damage the holes.
Is an aftermarket 18mm strap compatible with the Speedmaster Reduced 3510.12.00?
Yes: any strap with an 18mm lug width is mechanically compatible. However, aesthetic compatibility depends on style: the Reduced expresses its elegance best with structured leather, alligator, or quality rubber straps, avoiding excessively casual or oversized approaches. A vegetable-tanned leather strap allows you to take advantage of the variable strap length.
How long does a leather strap last on a Speedmaster Reduced 3510.12.00?
Durability depends on leather quality and wear level: an artisanal alligator or shell cordovan lasts 4–6 years if worn daily on one wrist, developing a pleasant patina. Hammer-grained calf resists 2–3 years before showing abrasion marks. Vulcanized rubber maintains its properties for up to 5 years, but gradually loses elasticity. Store the Reduced in a cool, dry environment when not worn.
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

