Technical Archive

TAG Heuer
Formula 1 CAZ1011.BA0843— lug 20mm

TAG Heuer Formula 1 CAZ1011.BA0843: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Formula 1 Chronograph Quartz 43 Stainless Steel / Black

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

TAG Heuer CAZ1011.BA0843
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

CAZ1011.BA0843

Movement

Ronda caliber 5040.D Hours, Minutes, Small Seconds | Date | Chronograph

The Heritage

The TAG Heuer Formula 1 CAZ1011.BA0843 is a contemporary evolution of an icon born in 1986, featuring a 43mm stainless steel and ceramic case with a 20mm lug width. It mounts the Ronda 5040.D quartz movement and includes chronograph, hours, minutes, small seconds, and date functions. The integrated flat-link bracelet and ceramic construction provide durability and scratch resistance for demanding conditions.

FAQ

What is the lug width of the TAG Heuer Formula 1 CAZ1011.BA0843?

The TAG Heuer Formula 1 CAZ1011.BA0843 features a 20mm lug width, the international standard for mid-sized sports watches. This measurement refers to the distance between the lugs (or pins) that connect the strap to the case. You can verify this using a digital calliper by measuring the distance between the two lugs protruding from the case.

What is the best strap for the TAG Heuer Formula 1 CAZ1011.BA0843?

The choice of strap depends on usage and aesthetic preferences. For those seeking formal elegance, we recommend alligator in black or dark brown, whose natural grain harmonises with the angular geometry of the ceramic and steel case. For sports use and practicality, vulcanised rubber in grey or black offers water resistance and versatility. Vegetable-tanned calf leather represents the intermediate solution, developing a natural patina over time.

How do I change the strap on my TAG Heuer Formula 1 CAZ1011.BA0843?

Strap replacement requires removal of the lugs using a small specialised tool (spring bar tool). We recommend entrusting the operation to the Casati Milano atelier to ensure precision and protection of the ceramic case. The lugs follow the 20mm international standard, compatible with any aftermarket strap of this size.

Can I use an aftermarket compatible strap with the TAG Heuer Formula 1 CAZ1011.BA0843?

Yes, the CAZ1011.BA0843 is fully compatible with aftermarket straps of 20mm lug width. The lugs follow the international standard, ensuring correct fit with any strap produced to this specification. However, we recommend choosing high-quality materials to maintain consistency with the case's performance and aesthetics.

How long does a leather strap last on the TAG Heuer Formula 1 CAZ1011.BA0843?

The lifespan of a leather strap depends on the material and usage. A high-quality strap in alligator or calf leather with vegetable tanning guarantees acceptable wear for 3-5 years in daily use. Natural leather ages by developing a patina that increases aesthetic appeal. To maximise durability, we recommend avoiding prolonged exposure to moisture, excessive heat, and direct sunlight. The Casati Milano atelier provides straps with an 18-month warranty.