The TUDOR Black Bay Chrono 39 Bumblebee Yellow (Ref. M79310N-0001) represents a significant evolution of the Black Bay Chrono through an entirely new 39mm case that reduces thickness to just 13.1mm, making this the slimmest Black Bay Chrono to date whilst the vibrant yellow dial with black subdials and fixed tachymetric bezel creates the distinctive Bumblebee aesthetic within TUDOR’s Daring Watches collection. The column-wheel Manufacture Calibre MT5813 with COSC certification brings the full Black Bay Chrono mechanical specification to a more refined and versatile case size.

At 39mm with 13.1mm thickness through polished and satin-finished stainless steel construction, this provides elegant chronograph proportions that wear considerably closer to a dress watch than the larger Black Bay Chrono whilst the yellow domed dial with contrasting black subdials creates bold visual character. The fixed stainless steel bezel with black anodised aluminium insert and tachymetric scale in silver markings maintains sports watch functionality whilst the domed sapphire crystal preserves vintage aesthetic continuity with the broader Black Bay family.

The Manufacture Calibre MT5813 delivers exceptional 70-hour power reserve with COSC certification through column wheel construction and bidirectional rotor system ensuring precise chronograph operation. The screw-down crown and pushers at 2 and 4 o’clock maintain 200m water resistance whilst the date at 6 o’clock provides practical calendar functionality.

The 3-link stainless steel bracelet with polished and satin-brushed finishes and T-fit rapid adjustment clasp provides comfortable daily wear with 8mm of tool-free micro-adjustment. The yellow dial positions this clearly within a growing TUDOR Daring Watches palette that includes Pink and Flamingo Blue variants.