Omega Constellation

Most Omega Constellation references take a 20 mm watch strap: 108 of 335. The lug width follows the case size: 27 mm case → 16 mm, 28 mm case → 17.5 mm, 35 mm case → 20 mm and 38 mm case → 20 mm.

Shop 16 mm Shop 18 mm Shop 20 mm

Omega Constellation lug width by case size

335 references measured; 164 more have an integrated bracelet. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
23 mm	14 mm	1	—	1566.66.00
24 mm	12 mm · 14 mm on 2	5	—	123.50.24.60.08.001, 123.55.24.60.55.002, 123.55.24.60.55.013
25 mm	14 mm · 18 mm on 1	3	—	131.15.25.60.99.001, 131.25.25.60.99.001
26 mm	16 mm · 14 mm on 1	3	—	1376.75.00, 1475.79.00
27 mm	16 mm · 14 mm on 9	39	—	123.10.27.20.55.001, 123.10.27.20.57.001, 123.10.27.60.05.001
28 mm	17.5 mm · 14 mm on 8 · 16 mm on 8	42	—	131.10.28.60.02.001, 131.10.28.60.03.001, 131.10.28.60.11.001
31 mm	18 mm · 14 mm on 2 · 16 mm on 2 · 19 mm on 1	17	—	123.20.31.20.05.001, 123.20.31.20.13.001, 123.20.31.20.55.001
34 mm	21 mm · 16 mm on 4 · 18 mm on 1 · 20 mm on 1	16	—	131.10.34.20.02.001, 131.10.34.20.53.001, 131.13.34.20.02.001
35 mm	20 mm · 18 mm on 16 · 16 mm on 9 · 19 mm on 2 · 14 mm on 1 · 17 mm on 1	78	—	111.10.36.20.52.001, 111.20.36.20.58.001, 111.25.36.10.52.001
36 mm	22 mm · 20 mm on 2	15	—	131.10.36.20.01.001, 131.10.36.20.02.001, 131.10.36.20.06.001
38 mm	20 mm · 18 mm on 11 · 16 mm on 1 · 19 mm on 1 · 22 mm on 1	51	—	123.10.38.21.01.002, 123.10.38.21.02.001, 123.10.38.21.02.002
39 mm	24 mm · 18 mm on 1	32	—	131.10.39.20.01.001, 131.10.39.20.02.001, 131.10.39.20.06.001
41 mm	20 mm · 18 mm on 6 · 16 mm on 1 · 21 mm on 1 · 22 mm on 1	26	—	121.52.41.50.08.001, 121.57.41.50.13.001, 121.62.41.50.01.001
44 mm	20 mm	2	—	121.32.44.52.01.001, 121.62.44.52.01.001
not recorded	18 mm · 19 mm on 1	5	—	168-005, 168-015, 2782-2799-SC

References that take a different watch strap

123.20.24.60.57.004: 14 mm, not the 12 mm of most 24 mm cases
123.25.24.60.63.001: 14 mm, not the 12 mm of most 24 mm cases
131.25.25.60.99.002: 18 mm, not the 14 mm of most 25 mm cases
1272.10.00: 14 mm, not the 16 mm of most 26 mm cases
123.10.27.60.02.001: 14 mm, not the 16 mm of most 27 mm cases
123.10.27.60.55.002: 14 mm, not the 16 mm of most 27 mm cases
123.15.27.20.03.001: 14 mm, not the 16 mm of most 27 mm cases
123.15.27.60.55.005: 14 mm, not the 16 mm of most 27 mm cases
123.25.27.20.05.001: 14 mm, not the 16 mm of most 27 mm cases
123.25.27.60.52.001: 14 mm, not the 16 mm of most 27 mm cases
123.25.27.60.63.001: 14 mm, not the 16 mm of most 27 mm cases
123.55.27.20.05.003: 14 mm, not the 16 mm of most 27 mm cases
123.55.27.60.99.004: 14 mm, not the 16 mm of most 27 mm cases
1191.71.00: 16 mm, not the 17.5 mm of most 28 mm cases
131.10.28.60.06.001: 14 mm, not the 17.5 mm of most 28 mm cases
131.10.28.60.55.001: 16 mm, not the 17.5 mm of most 28 mm cases
131.15.28.60.55.001: 16 mm, not the 17.5 mm of most 28 mm cases
131.15.28.60.56.001: 16 mm, not the 17.5 mm of most 28 mm cases
131.15.28.60.99.001: 14 mm, not the 17.5 mm of most 28 mm cases
131.20.28.60.13.001: 14 mm, not the 17.5 mm of most 28 mm cases
131.20.28.60.52.001: 14 mm, not the 17.5 mm of most 28 mm cases
131.20.28.60.55.001: 16 mm, not the 17.5 mm of most 28 mm cases
131.20.28.60.63.001: 16 mm, not the 17.5 mm of most 28 mm cases
131.25.28.60.55.002: 16 mm, not the 17.5 mm of most 28 mm cases

And 72 more in the full list below.

Questions about the Omega Constellation

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

No. The lug width changes with the case size: the 27 mm case takes 16 mm, the 28 mm case takes 17.5 mm, the 35 mm case takes 20 mm, the 38 mm case takes 20 mm and the 39 mm case takes 24 mm. Check your case diameter before you buy.

Can two Omega Constellation watches with a 35 mm case take different watch straps?

Yes. Of the 78 Omega Constellation references with a 35 mm case, 49 take 20 mm, 16 take 18 mm and 9 take 16 mm. The reference number decides, not the case size alone.

Every Omega Constellation 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 →