Tudor
Tudor Black Bay Chrono Carbon 25 79377KN
The Tudor Black Bay Chrono Carbon 25 (reference 79377KN) is a 42 mm carbon watch. It runs on the automatic caliber MT5813 with a 70-hour power reserve and is water resistant to 200 m. It was introduced in 2025.
Specifications
Case
- Reference
- 79377KN
- Collection
- Black Bay
- Case size
- 42 mm
- Thickness
- 14.3 mm
- Case material
- Carbon
- Water resistance
- 200 m
- Bracelet / strap
- Hybrid leather-rubber strap, tyre pattern
Dial and bezel
- Bezel
- Fixed carbon fibre tachymeter bezel
Movement
- Movement
- Automatic
- Caliber
- MT5813
- Power reserve
- 70 hours
- Frequency
- 28,800 vph
- Functions
- Chronograph / Date
Production
- Production
- 2025 – today (limited)
Dial versions
This reference was made with these dials and finishes.
79377KN White Racing Silver
M79377KN-0001
Racing Silver
79377KN
M79377KN-0002
Tortoise-shell pattern with gold accents
79377KN White Racing white, carbon sub-counters, yellow accents
M79377KN-0003
Racing white, carbon sub-counters, yellow accents
How it compares within the Black Bay family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 79377KN (This watch) | 42 mm | Carbon | — | MT5813 | 2025– |
| 79310N | 39 mm | Steel | Yellow | MT5813 | 2025– |
| 7939G1A0NRU | 39 mm | Stainless Steel | Black | MT5450-U | 2024– |
| 7941A1A0NU | 41 mm | Stainless Steel | Black | MT5602-U | 2023– |
| 79600 | 31 mm | Stainless Steel | — | MT5201 | 2023– |
| 79640 | 36 mm | Stainless Steel | — | MT5400 | 2023– |
| 79660 | 39 mm | Stainless Steel | — | MT5602 | 2023– |
| 79680 | 41 mm | Stainless Steel | — | MT5601 | 2023– |
| 79833MN | 41 mm | Steel | Black | MT5652 | 2022– |
About the Black Bay family
The Black Bay was introduced in 2012 as the Heritage Black Bay, a dive watch drawing on Tudor's 1950s Submariners with a domed crystal, a large crown without guards and snowflake hands. It quickly grew into Tudor's main family.
The first models used an ETA caliber; from 2016 the Black Bay moved to the in-house MT5602 and related calibers. The family includes the 39 mm Black Bay Fifty-Eight of 2018, the GMT, the Chrono, Bronze versions, the Pro, the smaller Black Bay 54 and Master Chronometer models from 2023. Dealers note the size, bezel colour, caliber generation and bracelet or strap, since many versions share the same look.
Quick answers
- What size is the Tudor Black Bay Chrono Carbon 25 79377KN?
- The Tudor Black Bay Chrono Carbon 25 79377KN has a 42 mm case, 14.3 mm thick.
- What movement does the Tudor Black Bay Chrono Carbon 25 79377KN use?
- It uses the automatic caliber MT5813, with a 70-hour power reserve.
- How water resistant is the Tudor Black Bay Chrono Carbon 25 79377KN?
- It is water resistant to 200 metres.
- Is the Tudor Black Bay Chrono Carbon 25 79377KN still in production?
- Limited.
- When did the Tudor Black Bay Chrono Carbon 25 79377KN come out?
- It was introduced in 2025.
- What is the Tudor Black Bay Chrono Carbon 25 79377KN made of?
- The case is carbon. Bracelet or strap: Hybrid leather-rubber strap, tyre pattern.
Catalog facts checked October 2026.