Omega Trésor

Most Omega Trésor references take a 20 mm watch strap: 36 of 99. The lug width follows the case size: 26 mm case → 13 mm, 36 mm case → 18 mm, 39 mm case → 19 mm and 40 mm case → 20 mm.

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Omega Trésor lug width by case size

99 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
26 mm	13 mm	27	—	428.15.26.60.04.001, 428.15.26.60.04.003, 428.17.26.60.04.001
36 mm	18 mm	26	—	428.15.36.60.02.001, 428.17.36.60.04.001, 428.17.36.60.05.001
39 mm	19 mm · 18 mm on 1	7	—	428.17.39.60.01.001, 428.17.39.60.02.001, 428.18.39.60.03.001
40 mm	20 mm	36	—	432.13.40.21.03.001, 432.18.40.21.03.001, 432.53.40.21.02.001
43 mm	21 mm	2	—	529.53.43.22.01.001, 529.53.43.22.99.001
44 mm	22 mm	1	—	528.53.44.21.03.001

References that take a different watch strap

428.58.39.60.02.001: 18 mm, not the 19 mm of most 39 mm cases

Questions about the Omega Trésor

Do all Omega Trésor case sizes take the same watch strap?

No. The lug width changes with the case size: the 26 mm case takes 13 mm, the 36 mm case takes 18 mm, the 39 mm case takes 19 mm and the 40 mm case takes 20 mm. Check your case diameter before you buy.

Every Omega Trésor reference

Other Omega families

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

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