TAG Heuer · Formula 1

Strap for Formula 1 Chronograph Quartz 42 Stainless Steel / Grey / 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
ReferenceCAZ1111.BA0878 (aka: CAZ1111BA0878, CAZ1111)
FamilyFormula 1
MovementRonda caliber 5040.D hours, minutes, small seconds | date | Chronograph
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Formula 1 CAZ1111.BA0878 (aka: CAZ1111BA0878, CAZ1111)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Formula 1 CAZ1111.BA0878 (aka: CAZ1111BA0878, CAZ1111), seen from the bench

The Formula 1 CAZ1111.BA0878 is equipped with the Ronda 5040.D quartz movement offering hours, minutes, small seconds, date and chronograph function. The model is part of the TAG Heuer Formula 1 collection, focused on sporty watchmaking. The case features a robust construction suitable for daily use and sports activities.

Frequently asked questions

What is the lug width of the TAG Heuer Formula 1 CAZ1111.BA0878?

The lug width of the TAG Heuer Formula 1 CAZ1111.BA0878 is 20mm. This measurement refers to the internal distance between the case holes where straps attach. It is a widely adopted ISO standard, ensuring compatibility with a vast range of aftermarket artisanal straps.

Which strap is recommended for the TAG Heuer Formula 1 CAZ1111.BA0878?

For the CAZ1111.BA0878, we recommend three options depending on your style: anthracite grey alligator to maintain sport-formal gravitas; textured calf with fine grain for durable daily wear; navy blue or charcoal grey NATO for maximum versatility. Your choice depends on intended use: formal, daily, or sport.

How do you change the strap on a TAG Heuer Formula 1 CAZ1111.BA0878?

The CAZ1111.BA0878 strap is changed by removing the locking lugs on the sides of the case (at 12 and 6 o'clock). Using a dedicated tool or pin, unlock the bracelet or old strap, then insert the new strap by aligning the holes with the lugs. The operation takes minutes and requires no technical expertise.

Is there an aftermarket strap compatible with the TAG Heuer Formula 1 CAZ1111.BA0878?

Yes. All artisanal straps with 20mm lug width are compatible with the CAZ1111.BA0878. Milano Straps offers leather, alligator, rubber, and textile straps, customisable in colour, stitching, and initials, ensuring perfect alignment with your style preferences.

How long does a leather strap last on a TAG Heuer Formula 1 CAZ1111.BA0878?

The lifespan of a quality artisanal leather strap depends on use and care. On average, a textured calf strap lasts 3-4 years with daily wear. Alligator or vegetable-tanned leather well maintained can exceed 5-6 years. Regular maintenance (cleaning and conditioning) significantly extends longevity.

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