Longines Heritage

Most Longines Heritage references take a 20 mm watch strap: 91 of 199. The lug width follows the case size: 25 mm case → 15 mm, 39 mm case → 20 mm, 40 mm case → 20 mm and 41 mm case → 20 mm.

Shop 16 mm Shop 18 mm Shop 19 mm Shop 20 mm Shop 21 mm Shop 22 mm

Longines Heritage lug width by case size

199 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
25 mm	15 mm	16	—	L2.501.0.83.3, L2.501.0.83.4, L2.501.0.83.6
26 mm	15 mm	2	—	L2.292.4.71.0, L4.267.8.73.2
33 mm	20 mm	1	—	L2.792.4.71.0
34 mm	19 mm	1	—	L4.767.8.73.2
35 mm	17 mm · 20 mm on 1	4	—	L4.746.6.72.0, L4.746.8.72.0, L4.746.8.78.2
36 mm	18 mm · 20 mm on 2 · 22 mm on 2	12	—	L2.310.4.12.0, L4.685.2.36.2, L4.685.2.76.2
38 mm	20 mm · 18 mm on 1	3	—	L2.601.4.11.2, L4.756.6.72.0
39 mm	20 mm · 19 mm on 19 · 16 mm on 1 · 21 mm on 1	43	—	L2.309.0.23.2, L2.719.8.12.2, L2.733.4.02.2
40 mm	20 mm · 18 mm on 3 · 19 mm on 3 · 21 mm on 2	30	—	L2.741.4.73.2, L2.747.4.52.4, L2.747.4.72.2
41 mm	20 mm · 18 mm on 2 · 21 mm on 2 · 16 mm on 1 · 19 mm on 1 · 22 mm on 1	33	—	L2.668.4.21.2, L2.745.4.53.4, L2.745.4.73.2
42 mm	20 mm · 22 mm on 3 · 19 mm on 2	12	—	L2.789.4.53.0, L2.789.4.53.3, L2.794.4.53.0
43 mm	22 mm · 20 mm on 5 · 25 mm on 3	16	—	L2.836.4.52.2, L2.836.4.52.6, L2.836.4.52.8
44 mm	22 mm · 25 mm on 1	5	—	L2.704.4.16.3, L2.704.4.56.3, L2.811.4.53.0
48 mm	25 mm · 20 mm on 2	11	—	L2.678.4.11.0, L2.713.4.13.0, L2.713.8.11.0
49 mm	20 mm	1	—	L2.779.4.53.0
not recorded	10 mm · 21 mm on 1 · 23 mm on 1	9	—	L2.195.0.83.3, L2.195.0.83.4, L2.195.0.83.6

References that take a different watch strap

L2.219.8.12.2: 20 mm, not the 17 mm of most 35 mm cases
L2.703.4.16.3: 22 mm, not the 18 mm of most 36 mm cases
L2.703.4.56.3: 22 mm, not the 18 mm of most 36 mm cases
L2.707.4.16.3: 20 mm, not the 18 mm of most 36 mm cases
L2.707.4.56.3: 20 mm, not the 18 mm of most 36 mm cases
L4.756.8.72.2: 18 mm, not the 20 mm of most 38 mm cases
L2.309.0.23.0: 16 mm, not the 20 mm of most 39 mm cases
L2.330.4.93.0: 19 mm, not the 20 mm of most 39 mm cases
L2.819.4.93.2: 19 mm, not the 20 mm of most 39 mm cases
L2.819.4.98.2: 19 mm, not the 20 mm of most 39 mm cases
L2.828.4.53.6: 19 mm, not the 20 mm of most 39 mm cases
L2.828.4.72.2: 19 mm, not the 20 mm of most 39 mm cases
L2.833.4.93.2: 19 mm, not the 20 mm of most 39 mm cases
L2.833.4.99.9: 19 mm, not the 20 mm of most 39 mm cases
L2.834.4.72.2: 19 mm, not the 20 mm of most 39 mm cases
L4.785.8.73.2: 21 mm, not the 20 mm of most 39 mm cases
L4.795.4.58.0: 19 mm, not the 20 mm of most 39 mm cases
L4.795.4.78.2: 19 mm, not the 20 mm of most 39 mm cases
L4.815.4.02.2: 19 mm, not the 20 mm of most 39 mm cases
L4.815.4.09.2: 19 mm, not the 20 mm of most 39 mm cases
L4.815.4.52.2: 19 mm, not the 20 mm of most 39 mm cases
L4.815.4.62.2: 19 mm, not the 20 mm of most 39 mm cases
L4.815.4.72.2: 19 mm, not the 20 mm of most 39 mm cases
L4.815.4.78.2: 19 mm, not the 20 mm of most 39 mm cases

And 36 more in the full list below.

Questions about the Longines Heritage

Do all Longines Heritage case sizes take the same watch strap?

No. The lug width changes with the case size: the 25 mm case takes 15 mm, the 39 mm case takes 20 mm, the 40 mm case takes 20 mm, the 41 mm case takes 20 mm and the 43 mm case takes 22 mm. Check your case diameter before you buy.

Can two Longines Heritage watches with a 39 mm case take different watch straps?

Yes. Of the 43 Longines Heritage references with a 39 mm case, 22 take 20 mm, 19 take 19 mm and 1 take 16 mm. The reference number decides, not the case size alone.