Omega · Speedmaster (Non-Moonwatch)

Strap for Speedmaster Date 40 Stainless Steel / White / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
Reference3513.33.00 (aka: 35133300)
FamilySpeedmaster (Non-Moonwatch)
MovementOmega caliber 1152 Hours, Minutes, Small Seconds | Date | Chronograph
CaseStainless Steel

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Speedmaster (Non-Moonwatch) 3513.33.00 (aka: 35133300)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

Frequently asked questions

What is the exact lug width of the Omega Speedmaster (Non-Moonwatch) 3513.33.00?

The lug width of the 3513.33.00 is 20mm, exactly the free space between the spring bar lugs measured from the inner edge of the upper lug to the lower one. This dimension is fixed and does not vary between different examples of the Reduced series.

What strap do you recommend for the Omega Speedmaster Reduced 3513.33.00?

For the 3513.33.00 we recommend natural alligator or vegetable-tanned calf for an elegant-sports aesthetic, or Tropic rubber if you prioritize chronographic use. The choice depends on the occasion and the tone of your dial. All 20mm straps in our collection guarantee structural compatibility.

How do you change the strap on this Omega model?

The strap is changed by extracting the spring bars with a dedicated tool (spring bar remover). The spring bars of the 3513.33.00 are standard, so the operation is straightforward: remove the old strap, insert the new one on the spring bars and ensure that the hooks engage correctly in the lug seats. No watchmaking skills required.

Can I use a non-Omega aftermarket strap on this chronograph?

Yes, absolutely. Any strap with a 20mm lug width is compatible with the 3513.33.00, provided the spring bar attachments are intact. Our artisanal straps are tested for structural compatibility and often offer superior build quality compared to original Omega straps.

How long does a leather strap last on a chronograph like the 3513.33.00?

Durability depends on the type of leather and usage. High-quality alligator or calf, worn regularly, maintains structural integrity for 5-7 years; the patina evolves naturally. In conditions of frequent perspiration or prolonged sun exposure, degradation accelerates. Casati Milano straps include an 18-month warranty and can be regenerated (restoration, restitching) to extend their lifespan.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only