Chronomat Automatic 36 Stainless Steel / Green / Rouleaux

In Context

At 36 mm it is classically proportioned: the size a dress watch was understood to be for most of the twentieth century, and small enough to sit under a cuff. At 10.1 mm thick it is about average for a modern wristwatch. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 100 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

The movement winds itself from the motion of your wrist. 42 hours of reserve carries it overnight, but not through a weekend in a drawer. At 28,800 vph the seconds hand advances 8 times a second.

A10380101L1A1 stands on its own in this catalogue — no other reference here shares its base number. It pairs a green dial with a stainless steel case.

The Caliber 10 is Breitling's thin three-hand automatic, an ETA 2892-A2 finished to chronometer standard. It powers 70 watches in this library, most of them the Chronomat Automatic 36 and the Superocean Heritage '57. The 2892 is a millimetre thinner than the 2824 the [Caliber 17](/calibers/breitling-caliber-17) is built on, and the [2892 piece](/blog/the-eta-2892) explains why that millimetre matters: it is the base maisons choose when the case has to stay slim. Breitling's version runs at 28,800 vph with a 42-hour reserve and 21 jewels, at 25.6 mm across, supplied by ETA or Sellita depending on the year, and every one is COSC-certified. In the library it sits under 33 [Chronomat Automatic 36](/brands/breitling/chronomat-36) references, the three-hand Chronomat of 2020 on the Rouleaux bracelet, 21 [Superocean Heritage '57](/brands/breitling/superocean-heritage-57) references, whose domed 1957-styled case needed the thinner base, 10 [Transocean 38s](/brands/breitling/transocean) and 5 [Superocean Heritages](/brands/breitling/superocean-heritage). The 36 mm case is the most common at 38 references, then 42 mm at 16 and 43 mm at 10. 13 of the 70 are limited editions. The [Caliber 49](/calibers/breitling-caliber-49) and [Caliber 37](/calibers/breitling-caliber-37) are the big-date and small-seconds movements on the same 2892 base.

69 other watches in the library run the Breitling Caliber 10.

Breitling

Breitling for Bentley GT Dark Sapphire Breitlight

XB0613C1/C984/166S/X20D.4.C · 44.8 mm

Breitling

Chronomat Automatic 36 Victoria Beckham Yellow Gold / Peppermint

K103801A1L1K1 · 36 mm

Breitling

Transocean

R1036012BA92737P · 43 mm

Breitling

Transocean Date Stainless Steel / Black / Croco / Pin

A1036012/BA91/743P/A20BA.1 · 43 mm