Omega · Speedmaster Moonwatch

Strap for Speedmaster Professional Moonwatch 3861 Moonshine Gold / Moonshine Gold

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

Lug width20 mm
Case diameter42 mm
Reference310.62.42.50.99.001
FamilySpeedmaster Moonwatch
MovementOmega caliber 3861 Small Seconds, Hours, Minutes | Chronograph | Chronometer
CaseMoonshine Gold | Ceramic, Moonshine Gold

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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Straps for the Speedmaster Moonwatch 310.62.42.50.99.001

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Speedmaster Moonwatch 310.62.42.50.99.001, seen from the bench

The Speedmaster Professional Moonwatch 3861 model 310.62.42.50.99.001 features a 42 mm Moonshine Gold case with a manual-wound caliber 3861 movement certified Chronometer, delivering 4 Hz frequency and 50-hour power reserve. The 20 mm lug width accommodates standard sports chronograph straps. The black brushed dial, Liquidmetal ceramic bezel, and transparent caseback showcase the column-wheel architecture, representing the direct evolution of the original 1861 movement worn on the Moon in 1969.

Frequently asked questions

What is the correct lug width for the Omega Speedmaster Moonwatch 310.62.42.50.99.001?

The Omega Speedmaster Moonwatch 310.62.42.50.99.001 uses a 20-millimeter lug width. This standard is recognizable by measuring the distance between the two articulation pins that attach the strap to the case. A 20mm strap fits perfectly without forcing.

Which strap material pairs best with the Moonshine Gold of the 310.62.42.50.99.001?

Black or dark brown alligator enhances the severity and instrumental DNA of the Moonwatch, while brushed calf offers versatility and conceals wear. For elegant contrast, a burgundy alligator or dark red shell cordovan strap enhances the yellow tone of the Moonshine Gold.

How do you change the strap on the Omega Speedmaster Moonwatch 310.62.42.50.99.001?

Remove the current strap using a spring bar tool to push the articulation pins laterally. Insert the new pins into the strap, then secure the strap to the case while keeping the pins in position. Ensure that the 20mm strap sits symmetrically on both sides.

Is the 310.62.42.50.99.001 compatible with standard 20mm aftermarket straps?

Yes, the Omega Speedmaster Moonwatch 310.62.42.50.99.001 accepts any quality strap with a 20mm lug width, from NATO models to structured leather such as alligator or shell cordovan. Ensure that the actual strap width corresponds exactly to 20mm to avoid lateral play or forcing.

How long does a leather strap last on the Moonwatch case 310.62.42.50.99.001?

A premium leather strap such as alligator or shell cordovan resists 3-5 years under normal wear conditions. Usage frequency, moisture exposure, and lifestyle significantly influence longevity. Vegetable-tanned leather develops patina and improves over time, while polished calf requires more regular maintenance.

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