Technical Archive

Breitling
Chronomat 36 A103801A1C1A1— lug 20mm

Breitling Chronomat 36 A103801A1C1A1: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Chronomat Automatic 36 Victoria Beckham Stainless Steel / Midnight Blue

Artisanal Note

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

Technical Specifications

Breitling A103801A1C1A1
Lug Width
20 mm

The essential strap measurement.

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Reference

A103801A1C1A1

Movement

Breitling caliber Caliber 10 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Chronomat 36 represents the reduced-size version of the Breitling Chronomat collection. It is powered by the automatic Caliber 10 with chronometer certification, featuring hour, minute, second and date functions. The 36mm case offers compact proportions while maintaining the distinctive features of the line.

FAQ

What is the lug width of the Breitling Chronomat 36 A103801A1C1A1?

The Breitling Chronomat 36 A103801A1C1A1 features a lug width of 20mm. This measurement is taken internally between the two lugs at case level using a digital calliper for an accurate reading. It is a standard size with broad aftermarket support.

What is the best strap for the Breitling Chronomat 36 A103801A1C1A1?

For the steel Chronomat 36, a Mississippi alligator strap with a matte finish offers the best sport-elegance balance. For everyday wear, a vegetable-tanned calf leather strap develops a distinctive patina over time. A two-colour NATO strap is also a strong option that references the model's aerobatic heritage.

How do you change the strap on the Breitling Chronomat 36 A103801A1C1A1?

The strap on the Chronomat 36 is secured by standard 20mm spring bars. Use a thin-blade spring bar tool to release them without scratching the lugs. The operation takes a few minutes and requires no watchmaker intervention, provided you work on a soft surface with the correct tool.

Are there aftermarket straps compatible with the Breitling Chronomat 36 A103801A1C1A1?

Yes. The Chronomat 36 has 20mm lugs with a slight downward curvature: it is important to select aftermarket straps that match this geometry to ensure a proper fit against the case. Milano Straps offers a range of handcrafted 20mm compatible straps, with bespoke options available through the Casati Milano atelier.

How long does a leather strap last on a Breitling Chronomat 36?

The lifespan of a leather strap depends on the material and care routine. A vegetable-tanned calf strap in regular use typically lasts 2–3 years. Shell cordovan, owing to its dense fibre structure, can last 4–5 years or more. Prolonged exposure to water and perspiration accelerates wear; for sport use, alternating with a rubber or NATO strap is advisable.