Omega · Speedmaster

Strap for Omega Speedmaster 105.003 Ed White (lugs dritti)

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

Lug width19 mm
Reference105003
FamilySpeedmaster

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The Speedmaster 105003, seen from the bench

The Omega Speedmaster 105.003 Ed White, produced between 1963 and 1969, features the manual-wind caliber 321 chronograph movement. The case measures 42 mm in diameter, crafted in 316L stainless steel with 14.7 mm thickness. The strap width is 19 mm. This model represents a transition in the Speedmaster collection, equipped with a tachymetric bezel, rectangular plexi crystal, and 50 meters water resistance. The caliber 321 oscillates at 18,000 beats per hour with a 48-hour power reserve.

Frequently asked questions

What is the exact lug width of the Omega Speedmaster 105003?

The lug width of the Speedmaster 105003 is 19 millimetres. This width is model-specific and must be respected to ensure full strap compatibility. To measure the lug width, position a digital calliper perpendicularly across the pins that support the strap from the inside.

What is the best strap to pair with the Omega Speedmaster 105003?

The best strap choice depends on intended use and aesthetic preference. For formal elegance, we recommend black alligator leather with fine grain texture. For historical durability, shell cordovan in burgundy or cognac tones develops natural patina over time. For a sporting profile, a grained rubber strap or Cordura NATO textile emphasises the original tool-watch heritage.

How do you change the strap on a Speedmaster 105003 without damaging the case?

Use a dedicated spring bar removal tool: position the watch on a soft pad, locate the lateral pins passing through the lugs, insert the removal tool into the rear case opening and apply gentle, steady pressure. Once the pin is extracted, the old strap separates automatically. For installation, reverse the process, ensuring the pin is perfectly centred before complete insertion.

Is an aftermarket strap compatible with the Omega Speedmaster 105003?

Yes, provided the lug width is exactly 19 millimetres and the pins are the correct size. Bespoke artisanal straps guarantee full compatibility and often provide aesthetic and construction advantages over original options, including customisation of stitching thread and leather selection.

How long does a leather strap last on an Omega Speedmaster 105003?

A vegetable-tanned quality leather strap typically lasts 4-6 years with moderate daily wear. Longevity depends on sun exposure, water contact and usage frequency. Shell cordovan straps can exceed 7-8 years whilst maintaining structural integrity. Periodic maintenance—gentle cleaning and occasional treatment with specialist oil—significantly extends lifespan.

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