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Tudor Black Bay One

Most Tudor Black Bay One references take a 19 mm watch strap: 42 of 121. The lug width follows the case size: 31 mm case → 17 mm, 36 mm case → 19 mm, 39 mm case → 21 mm and 41 mm case → 22 mm.

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Tudor Black Bay One lug width by case size

121 references measured. Updated 2026-10-29.

CaseLug widthReferencesWatch strap attachmentFor example
31 mm17 mm · 16 mm on 824—79600, 79600-0001, 79600-0002
36 mm19 mm42—79500, 79500-0001, 79500-0002
39 mm21 mm · 20 mm on 824—79660, 79660-0001, 79660-0002
41 mm22 mm31—79540, 79540-0001, 79540-0003

References that take a different watch strap

  • 79603: 16 mm, not the 17 mm of most 31 mm cases
  • 79603-0003: 16 mm, not the 17 mm of most 31 mm cases
  • 79603-0004: 16 mm, not the 17 mm of most 31 mm cases
  • 79613: 16 mm, not the 17 mm of most 31 mm cases
  • 79613-0001: 16 mm, not the 17 mm of most 31 mm cases
  • 79613-0002: 16 mm, not the 17 mm of most 31 mm cases
  • 79613-0003: 16 mm, not the 17 mm of most 31 mm cases
  • 79613-0004: 16 mm, not the 17 mm of most 31 mm cases
  • 79663: 20 mm, not the 21 mm of most 39 mm cases
  • 79663-0003: 20 mm, not the 21 mm of most 39 mm cases
  • 79663-0004: 20 mm, not the 21 mm of most 39 mm cases
  • 79673: 20 mm, not the 21 mm of most 39 mm cases
  • 79673-0001: 20 mm, not the 21 mm of most 39 mm cases
  • 79673-0002: 20 mm, not the 21 mm of most 39 mm cases
  • 79673-0003: 20 mm, not the 21 mm of most 39 mm cases
  • 79673-0004: 20 mm, not the 21 mm of most 39 mm cases

Questions about the Tudor Black Bay One

Do all Tudor Black Bay One case sizes take the same watch strap?

No. The lug width changes with the case size: the 31 mm case takes 17 mm, the 36 mm case takes 19 mm, the 39 mm case takes 21 mm and the 41 mm case takes 22 mm. Check your case diameter before you buy.

Can two Tudor Black Bay One watches with a 31 mm case take different watch straps?

Yes. Of the 24 Tudor Black Bay One references with a 31 mm case, 16 take 17 mm and 8 take 16 mm. The reference number decides, not the case size alone.

Every Tudor Black Bay One reference

Other Tudor families

Inside each one the lug width often changes: it is the reference that decides.

All Tudor families → · Why the size changes inside a family →