Omega · Speedmaster (Non-Moonwatch)

Strap for Speedmaster Moonphase Stainless Steel / Silver Meteorite / Bracelet

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter43 mm
Reference304.30.43.52.06.001
FamilySpeedmaster (Non-Moonwatch)
MovementOmega caliber 9914 hours, minutes, small seconds | date | Chronograph, column wheel | moonphase | chronometer, co-Axial escapement
Year2025
CaseMeteorite | Ceramic, Stainless Steel

Recommended spring bar

Omega Spring Bars 21mm — Single Diameter

Technical match for lug width and diameter · lug 21 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Speedmaster (Non-Moonwatch) 304.30.43.52.06.001

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Speedmaster (Non-Moonwatch) 304.30.43.52.06.001, seen from the bench

The Speedmaster reference 304.30.43.52.06.001 mounts the automatic Omega caliber 9914 with a co-axial escapement and chronometer certification. The movement integrates chronograph functions with a column-wheel, moon phases, and a date display, in addition to a small seconds hand. The lugs measure 21mm in width.

Frequently asked questions

What is the lug width of the Omega Speedmaster 304.30.43.52.06.001?

The lug width of the 304.30.43.52.06.001 is 21 mm. This dimension is specific to this model and determines the exact width of compatible straps. It is measured from the inner space between the two lugs of the case.

What is the best strap for the Omega Speedmaster meteorite 304.30.43.52.06.001?

For the meteorite dial of this Speedmaster, we recommend black alligator or burgundy shell cordovan with polished steel deployant. These choices enhance the cosmic texture of the meteorite without creating visual conflicts. The 21 mm straps on MilanoStraps offer complete customization.

How do I change the strap on this Speedmaster?

The 304.30.43.52.06.001 uses straight lugs with standard 21 mm width. To change the strap: release the lug pins (usually with a watchmaker's tool), remove the old strap, insert the new one and secure the pins. If you prefer to avoid any risk, Casati Milano can perform the replacement during a personalized consultation.

Can I use a 20 mm or 22 mm strap on this Omega?

No. 20 mm straps would be too tight and unstable on the lugs, while 22 mm straps would force the case protrusions. Only 21 mm straps guarantee the correct fit and structural safety that this watch deserves.

How long does a leather strap last on this watch?

A quality leather strap (alligator or cordovan) typically lasts 3-5 years with regular use, up to 7-10 years with careful maintenance and rotation with other straps. Vegetable-tanned leather develops patina and improves over time. MilanoStraps guarantees 18 months on all straps made at the Casati Milano 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