Omega · Speedmaster Moonwatch

Strap for Speedmaster Broad Arrow

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter39 mm
ReferenceCK2915-1
FamilySpeedmaster Moonwatch
MovementOmega caliber 321 small seconds, hours, minutes | Chronograph, column wheel
Year1957 - 1959/6
CaseStainless Steel

Recommended spring bar

Spring bars Omega Speedmaster Seamaster 19mm

Technical match for lug width and diameter · lug 19 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Speedmaster Moonwatch CK2915-1

Selected for the 19 mm lug width

All 19 mm straps →

The Speedmaster Moonwatch CK2915-1, seen from the bench

The Omega Speedmaster Moonwatch CK2915-1 is a chronograph powered by the caliber 321 movement in stainless steel, historically worn by Apollo 11 astronauts on the Moon in 1969. The 38.60 mm case features a tachymeter bezel, black dial with applied indices, and 60 meters water resistance. The 19 mm lug width reflects 1960s sports watch standards and requires a strap that respects the original design proportions without visual imbalance.

Frequently asked questions

What is the exact lug width of the Omega Speedmaster Moonwatch CK2915-1?

The lug width of the CK2915-1 measures exactly 19 mm. This is the distance between the two lateral lugs where the strap is inserted. To verify compatibility, use a caliper to measure the distance between the two lugs of your case. It is important to measure with precision to ensure a perfect fit without play or gaps.

Which strap material is most suitable for the Speedmaster Moonwatch CK2915-1?

For the CK2915-1 we recommend three main choices. Embossed alligator offers a sculptural texture that dialogues beautifully with the rigorous lines of the case and develops a splendid patina over time. Vegetable-tanned calf is the most versatile solution – it adapts to the wrist naturally and develops a warm patina in line with the vintage aesthetic of the watch. Shell cordovan represents the pinnacle of durability and artisanal beauty, with a reddish tone that harmonizes perfectly with stainless steel.

How do I change the strap on my Omega Speedmaster Moonwatch CK2915-1?

Changing the strap is simple: use a dedicated tool called a spring bar remover (available for just a few euros). Insert the flat tip into the space between the lug and the old strap, apply gentle pressure to release the pin and slide it out completely. Repeat on the other side. Insert the new strap by sliding the pin into the supplied spring, pressing until you hear a click closure. If you are unsure about the procedure, consult a trusted watchmaker.

Can I mount an aftermarket compatible strap on my CK2915-1?

Certainly yes. Any strap with a 19 mm lug width is compatible with your Speedmaster Moonwatch CK2915-1. The <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-19mm">19 mm straps available on MilanoStraps</a> are all verified for compatibility, made from fine leather or artisanal quality rubber. Choose the material and color according to your taste and usage requirements.

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

The lifespan of a leather strap depends on use and maintenance. On average, a quality artisanal calf strap lasts 3-5 years of daily wear. Shell cordovan, being more robust, can last 5-7 years. Alligator varies depending on the quality of the tanning: excellent artisanal embossed alligator lasts 4-6 years. Longevity increases significantly if the strap is not worn daily. Regular maintenance – keeping the leather away from excess moisture and cleaning it gently – extends the life of the strap.

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