Tudor Black Bay Chrono 39 Bumblebee 79310N

The Tudor Black Bay Chrono 39 Bumblebee 79310N takes a 20 mm watch band.

Tudor Black Bay Chrono 39 Bumblebee 79310N, 20 mm lug width

Tudor · Black Bay Chrono 39 Bumblebee

Lug width
20 mm
Case diameter
39 mm
Reference
79310N
Family
Black Bay Chrono 39 Bumblebee
Case material
acciaio inossidabile, ghiera fissa in acciaio con inserto in alluminio anodizzato nero, corona avvitabile, spingitore avvitabile, fondello avvitabile, cristallo zaffiro bombato
Water resistance
200
Model
Black Bay Chrono 39 Bumblebee 79310N
Year
2026

Will a strap close on your wrist?

Set for this watch: 39 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.

mm

Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.

75 mm115 mm

Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.

Why ready-made straps come in one length →

Sizing notes

  • 20 mm is the gap between the lugs, so a 20 mm band goes in without adapters. Whether it sits flush against a 39 mm case depends on how that case is shaped.
  • 20 mm is one of the common sizes: 15,081 of the 41,485 watches measured take it, which is why it is the width most bands are cut in. Every watch that takes 20 mm →