Technical Archive

Breitling
Chronomat 36 A10380101L1A1— lug 18mm

Breitling Chronomat 36 A10380101L1A1: 18mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Chronomat Automatic 36 Stainless Steel / Green / Rouleaux

Artisanal Note

"This model requires a precise 18mm lug width to preserve the original sartorial balance."

Technical Specifications

Breitling A10380101L1A1
Lug Width
18 mm

The essential strap measurement.

Browse 18mm straps →
Reference

A10380101L1A1

Movement

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

The Heritage

The Breitling Chronomat Automatic 36 Stainless Steel Green features the iconic Chronomat design originally created in 1984 for Frecce Tricolori pilots. This 36mm steel case houses the Breitling Caliber 10 COSC-certified chronometer movement, offering hours, minutes, seconds, and date functions. The integrated Rouleaux bracelet connects seamlessly to the case, while the bidirectional bezel displays four markers at 12, 3, 6, and 9 o'clock. With an 18mm lug width, this model maintains the recognizable visual language of the Chronomat line at a proportional diameter.

FAQ

What is the lug width of the Breitling Chronomat 36 A10380101L1A1?

The Breitling Chronomat 36 A10380101L1A1 has a lug width of 18mm. This measurement should be taken with a digital calliper placed internally between the two lugs, perpendicular to the caseback axis. It is the essential figure for selecting any compatible aftermarket strap.

What is the best strap for the Breitling Chronomat 36 A10380101L1A1?

For the Chronomat 36 in stainless steel, the most suitable straps are: wide-grain alligator for a formal look with texture consistent with the bezel, vegetable-tanned calf leather for those seeking a natural patina, shell cordovan for everyday urban wear, and nylon NATO for sporting use. Strap ends should be curved to match the geometry of the integrated Rouleaux bracelet lugs.

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

The Chronomat 36 uses standard 18mm spring bars. To replace the strap, use a spring bar tool or fork-type screwdriver to release the bars from the lugs, remove the existing bracelet or strap, and fit the new one with replacement spring bars. It is advisable to work on a soft surface to protect the case. Alternatively, any watchmaker or the Casati Milano atelier can perform the operation safely.

Are there aftermarket straps compatible with the Breitling Chronomat 36 A10380101L1A1?

Yes, there are many compatible aftermarket straps in 18mm. It is essential to choose straps with curved ends to correctly fit the lug geometry of the Chronomat 36, avoiding gaps between the case and strap. Milano Straps offers a selection of handcrafted 18mm straps specifically made with ends suited to this watch family.

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

The lifespan of a leather strap depends on the material and level of use. A quality vegetable-tanned calf strap, with daily wear, typically lasts 18–24 months before replacement is needed. Shell cordovan, thanks to its dense structure, can exceed 3 years. Alligator, when maintained with neutral products and kept away from prolonged moisture, retains its shape and colour for 2–4 years. Casati Milano straps carry an 18-month warranty against manufacturing defects.