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Omega · Speedmaster Moonwatch

Strap for Speedmaster Professional Apollo XVII Last Man

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

Lug width

20mm
20 mm strapsAll Omega
Lug width20 mm
Case diameter42 mm
Reference3574.51.00 (aka: 35745100)
FamilySpeedmaster Moonwatch
MovementOmega caliber 1861 small seconds, hours, minutes | Chronograph
Year2002 - 2002/6
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

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All Omega spring barsOpen →

Straps for the Speedmaster Moonwatch 3574.51.00 (aka: 35745100)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Speedmaster Moonwatch 3574.51.00 (aka: 35745100), seen from the bench

The Omega Speedmaster Professional 3574.51.00 is the iconic chronograph certified by NASA for extravehicular activity in space, accompanying Apollo 11 astronauts to the Moon in 1969. It mounts the manual caliber Omega 1861, the same movement that established the lunar legend, with manual winding, no date, and three chronograph counters. The case measures 42 mm in diameter in satin stainless steel, 14.5 mm thick, with 50 meters water resistance, sapphire crystal, and 48-hour power reserve. Lug width is 20 mm.

Frequently asked questions

What is the lug width of the Omega Speedmaster Moonwatch 3574.51.00?

The lug width of the 3574.51.00 is 20 millimeters, measured internally between the two lugs of the case. This dimension is standard for the Moonwatch across all its modern versions and allows compatibility with a wide selection of artisanal aftermarket straps.

Which strap pairs best with the Speedmaster Moonwatch 3574.51.00?

The choice depends on intended use. For formal elegance, cognac brown alligator or shell cordovan offer natural patina and versatility. For historical authenticity and sports use, a NATO in canvas or technical rubber recreates the aesthetic of the Apollo missions. Vegetable-tanned calf leather represents the modern ethical-aesthetic compromise.

How do I change the strap on my Speedmaster 3574.51.00?

Remove the steel lugs from the case using a dedicated tool or spring bar tool. Extract the strap from the lugs. Insert the new strap in the reverse sequence, ensuring the lugs are completely locked in the case seat. Avoid excessive force that could scratch the brushed steel.

Is an aftermarket strap compatible with the Speedmaster Moonwatch 3574.51.00?

Yes, provided the lug width is exactly 20 millimeters. Artisanal straps from Milano Straps are specifically constructed for this dimension, maintaining correct visual proportions with the 42mm case and steel lug.

How long does a leather strap last on an Omega Speedmaster?

A quality leather strap, with vegetable tanning or alligator, maintains functionality and aesthetics for 3 to 5 years of daily use, depending on care and environmental exposure. The patina improves with age. Casati Milano straps include an 18-month warranty and restoration possibility at the atelier.

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