Omega · Speedmaster Moonwatch

Strap for Speedmaster Professional Moonwatch Yellow Gold / 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 diameter42 mm
Reference3195.50.00 (aka: 31955000)
FamilySpeedmaster Moonwatch
MovementOmega caliber 1863 Hours, Minutes, Small Seconds | Chronograph
CaseYellow 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

All Omega spring barsOpen →

Straps for the Speedmaster Moonwatch 3195.50.00 (aka: 31955000)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Speedmaster Moonwatch 3195.50.00 (aka: 31955000), seen from the bench

The Speedmaster Moonwatch was introduced in the 1950s as a sporty chronograph and later selected by NASA for space missions. It is equipped with the manual-winding Omega caliber 1863 with hour, minute, small seconds and chronograph functions. The lugs measure 20mm in width.

Frequently asked questions

What is the lug width of the Omega Speedmaster Moonwatch 3195.50.00?

The lug width of the 3195.50.00 is 20mm, measured between the case lugs. This measurement is standard for the Moonwatch Professional and is compatible exclusively with straps designed for 20mm. Always verify with a ruler or digital caliper before ordering.

Which strap is recommended for the Omega Speedmaster 3195.50.00 in yellow gold?

For the Moonwatch in yellow gold, brown or cognac alligator represents the most elegant choice, enhancing the warmth of the gold. Alternatively, vegetable-tanned calf leather in grey or black tones offers modern versatility, while NATO or rubber maintains the sports-functional character of the chronograph.

How do I change the strap on my Omega Speedmaster Moonwatch 3195.50.00?

The Speedmaster Professional 3195.50.00 features standard lugs (non-quick-release). Use a lug removal tool or a small flat screwdriver to gently push the spring bar outward from one side of the case, removing the old strap. Insert the new strap by aligning it with the lugs and reinsert the spring bar, ensuring it is securely fixed on both sides.

Can I use an aftermarket strap on my Speedmaster Moonwatch 3195.50.00?

Yes, provided the strap is designed for 20mm lug width. Specialized brands such as those available on MilanoStraps offer artisanal leather, rubber, and fabric straps that are perfectly compatible. Artisanal quality ensures longevity and an aesthetic that rivals original Omega straps.

How long does a leather strap last on my Omega Speedmaster Moonwatch?

A quality artisanal leather strap has an average lifespan of 3-5 years with daily use and regular maintenance. Factors such as climate, personal perspiration, and cleaning frequency significantly influence longevity. FKM rubber or NATO straps tend to last longer. Casati Milano guarantees 18 months, but replacement is simple and relatively economical compared to the watch's value.

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