Breguet Classique Complications

Most Breguet Classique Complications references take a 21 mm watch strap: 13 of 49. The lug width follows the case size: 35 mm case → 18 mm, 39 mm case → 20 mm, 40 mm case → 20 mm and 41 mm case → 21 mm.

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Breguet Classique Complications lug width by case size

49 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
35 mm	18 mm · 20 mm on 3	10	—	3355PT/00/986, 3357BA/12/986, 3357BB/12/986
39 mm	20 mm · 18 mm on 3	7	—	5317BR/12/9V6, 5317PT/12/9V6, 7327BB/11/9VU
40 mm	20 mm · 21 mm on 2 · 18 mm on 1	7	—	5335BR/42/RW0, 5359BB/6B/9V6/DD0D, 5447BB/1E/9V6
41 mm	21 mm · 20 mm on 1	10	—	3795BR/1E/9WU, 3795PT/1E/9WU, 3797BR/1E/9WU
42 mm	22 mm · 21 mm on 2	7	—	7637BB/12/9ZU, 7637BB/2Y/9ZU, 7637BR/12/9ZU
44 mm	22 mm	4	—	5347BR/11/9ZU, 5347BR/2A/9ZU, 5347PT/11/9ZU
46 mm	23 mm	2	—	5345BR/1S/5XU, 5345PT/1S/7XU
50 mm	24 mm	2	—	5349PT/11/9YV/DD0D, 5349PT/2Y/9YV/DD0D

References that take a different watch strap

3355PT/00/PA0: 20 mm, not the 18 mm of most 35 mm cases
3357BR/12/986: 20 mm, not the 18 mm of most 35 mm cases
3358BB/52/986/DD00: 20 mm, not the 18 mm of most 35 mm cases
5317BA/12/9V6: 18 mm, not the 20 mm of most 39 mm cases
5317BR/12/RV0: 18 mm, not the 20 mm of most 39 mm cases
5317PT/12/PV0: 18 mm, not the 20 mm of most 39 mm cases
5335BR/42/9W6: 21 mm, not the 20 mm of most 40 mm cases
5335PT/42/9W6: 21 mm, not the 20 mm of most 40 mm cases
5335PT/42/PW0: 18 mm, not the 20 mm of most 40 mm cases
5365BR/15/9WU: 20 mm, not the 21 mm of most 41 mm cases
5377BR/12/9WU: 21 mm, not the 22 mm of most 42 mm cases
5377PT/12/9WU: 21 mm, not the 22 mm of most 42 mm cases

Questions about the Breguet Classique Complications

Do all Breguet Classique Complications case sizes take the same watch strap?

No. The lug width changes with the case size: the 35 mm case takes 18 mm, the 39 mm case takes 20 mm, the 40 mm case takes 20 mm, the 41 mm case takes 21 mm and the 42 mm case takes 22 mm. Check your case diameter before you buy.

Can two Breguet Classique Complications watches with a 35 mm case take different watch straps?

Yes. Of the 10 Breguet Classique Complications references with a 35 mm case, 7 take 18 mm and 3 take 20 mm. The reference number decides, not the case size alone.