Tudor Black Bay Chrono 39 Bumblebee: A More Compact Chronograph With Bold Yellow Dial
Tudor Introduces a Smaller, Bolder Black Bay Chrono 39 Bumblebee
Tudor has unveiled a striking new addition to its Black Bay collection: the Black Bay Chrono 39 Bumblebee, reference 79310N. Released on June 3, 2026, this model represents more than just a new colour scheme — it marks the first time the Black Bay Chrono has been offered in a reduced 39mm case size. According to Monochrome Watches, the move mirrors what Tudor achieved when it launched the 39mm Black Bay 58 back in 2018.
Compact Dimensions for Everyday Wear
Until now, all versions of the Black Bay Chrono measured 41mm in diameter, 14.2mm in thickness, and 49.9mm lug-to-lug. The new Bumblebee edition shrinks those figures to 39mm diameter, 13.1mm thickness, and 47mm lug-to-lug. The result is a chronograph that promises significantly improved wearing comfort on smaller wrists while maintaining 200m water resistance.
Key design updates include a new, more traditional crown shape and a more domed caseback, which together make the case flanks appear thinner than before. The fixed anodised aluminium bezel with tachymeter scale and the domed sapphire crystal remain faithful to the original design language.
Technical Specifications
| Specification | Detail |
|---|---|
| Case | 39mm x 13.1mm, stainless steel |
| Dial | Matte yellow with black sub-counters |
| Movement | Calibre MT5813 (Breitling B01 base) |
| Power Reserve | 70 hours |
| Water Resistance | 200m |
| Bracelet | 3-link steel with T-Fit micro-adjust clasp |
| Reference | 79310N |
The matte yellow dial with blackened accents on the sub-counters, hands, and applied markers creates a bold "bumblebee" aesthetic. All elements are filled with white Super-LumiNova, and the classic snowflake hour hand remains intact.
Pricing and Availability
The Tudor Black Bay Chrono 39 Bumblebee is priced at EUR 6,200 / CHF 5,500. It is part of the "Daring Watches" collection alongside the Pink and Flamingo models, meaning it may not be as easily accessible as other Tudor references.
Frequently Asked Questions
What is the difference between the BB Chrono 39 and the 41mm version?
The BB Chrono 39 is 2mm narrower, 1.1mm thinner, and 2.9mm shorter lug-to-lug than the 41mm version. It also features a redesigned crown and caseback for a slimmer profile.
Does the BB Chrono 39 use the same movement?
Yes, it uses the same calibre MT5813, a COSC-certified automatic chronograph based on the Breitling B01 architecture with a column wheel and 70-hour power reserve.
Is the Bumblebee a limited edition?
No, it is part of the "Daring Watches" collection but is not a numbered limited edition. However, availability may be limited compared to standard models.
According to Monochrome Watches, the Black Bay Chrono 39 Bumblebee is a "powerful" evolution that addresses long-standing requests for a smaller chronograph option. For more details, visit tudorwatch.com.
Related reading: Our Complete Guide to the Tudor Black Bay Collection