Breitling
Breitling Chronomat 44 GMT HB0421L3.BC18.743P
The Breitling Chronomat 44 GMT (reference HB0421L3.BC18.743P) is a 44 mm rose gold watch with a black dial.
Specifications
Case
- Reference
- HB0421L3.BC18.743P
- Collection
- Chronomat
- Case size
- 44 mm
- Case material
- Rose gold
- Bracelet / strap
- Croco leather strap
Dial and bezel
- Dial
- Black
Movement
- Functions
- GMT
Dial versions
This reference was made with these dials and finishes.
HB0421L3.BC18.743P Black
HB0421L3.BC18.743P
Black
How it compares within the Chronomat family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| HB0421L3.BC18.743P (This watch) | 44 mm | Rose gold | Black | — | — |
| A10380 | 36 mm | Stainless steel | — | 10 | 2020– |
| A17356 | 38 mm | Stainless steel | Ice Blue / Pink / White | 17 | 2021– |
| A32398 | 40 mm | Stainless steel | — | 32 | 2021– |
| A77310 | 32 mm | Stainless steel | — | 77 | 2020– |
| AB0134 | 42 mm | Stainless steel | — | B01 | 2020– |
| AB0136 | 44 mm | Stainless steel | Black / Blue / Green / Anthracite | B01 | 2021– |
| AB0158 | 42 mm | Stainless steel | — | B01 | 2026– |
| AB3114 | 40 mm | Stainless steel | — | B31 | — |
About the Chronomat family
The Chronomat name first appeared on a 1940s Breitling chronograph with a slide-rule bezel. The modern Chronomat was introduced in 1984, with rider tabs on the bezel, and became the brand's main sports chronograph. In 2009 it was the first watch to carry Breitling's in-house caliber B01.
The 2020 generation brought back the Rouleaux bracelet with its rounded links. The catalog lists more than two hundred references, including chronographs, three-hand automatics, GMTs and smaller models, in steel, red gold, Blacksteel and two-tone. Dealers identify the generation, size and caliber from the reference and check the bracelet.
Quick answers
- What size is the Breitling Chronomat 44 GMT HB0421L3.BC18.743P?
- The Breitling Chronomat 44 GMT HB0421L3.BC18.743P has a 44 mm case.
- What is the Breitling Chronomat 44 GMT HB0421L3.BC18.743P made of?
- The case is rose gold. Bracelet or strap: Croco leather strap.
Catalog facts checked October 2026.