Tudor
Tudor Black Bay Chrono 39 79310N
“Bumblebee”
The Tudor Black Bay Chrono 39 (reference 79310N) is a 39 mm steel watch with a yellow dial. 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 and is still in production.
Specifications
Case
- Reference
- 79310N
- Nickname
- Bumblebee
- Collection
- Black Bay
- Case size
- 39 mm
- Thickness
- 13.1 mm
- Case material
- Steel
- Crystal
- Domed sapphire
- Water resistance
- 200 m
- Bracelet / strap
- Steel
Dial and bezel
- Dial
- Yellow
- Bezel
- Fixed steel bezel, black anodised aluminium insert with tachymeter
Movement
- Movement
- Automatic
- Caliber
- MT5813
- Power reserve
- 70 hours
- Frequency
- 28,800 vph
- Jewels
- 41
- Functions
- Chronograph / Date
Production
- Production
- 2025 – today (current)
Dial versions
This reference was made with these dials and finishes.
79310N Bumblebee
M79310N-0001
Black sub-counters, domed, date at 6 · “Bumblebee”
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 |
|---|---|---|---|---|---|
| 79310N (This watch) | 39 mm | Steel | Yellow | MT5813 | 2025– |
| 79360N | 41 mm | Steel | — | MT5813 | 2021– |
| 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 39 79310N?
- The Tudor Black Bay Chrono 39 79310N has a 39 mm case, 13.1 mm thick.
- What movement does the Tudor Black Bay Chrono 39 79310N use?
- It uses the automatic caliber MT5813, with a 70-hour power reserve.
- How water resistant is the Tudor Black Bay Chrono 39 79310N?
- It is water resistant to 200 metres.
- Is the Tudor Black Bay Chrono 39 79310N still in production?
- Yes, it is a current reference.
- When did the Tudor Black Bay Chrono 39 79310N come out?
- It was introduced in 2025.
- What is the Tudor Black Bay Chrono 39 79310N made of?
- The case is steel. Bracelet or strap: Steel.
- What is the Tudor Black Bay Chrono 39 79310N nicknamed?
- Dealers and collectors call it the “Bumblebee”.
Catalog facts checked October 2026.