Longines PrimaLuna

Most Longines PrimaLuna references take a 6 mm watch strap: 122 of 198. The lug width follows the case size: 23 mm case → 6 mm, 27 mm case → 6 mm, 30 mm case → 8 mm and 34 mm case → 8 mm.

Longines PrimaLuna lug width by case size

198 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
23 mm	6 mm	18	—	L8.109.0.87.6, L8.109.4.87.6, L8.109.5.78.6
27 mm	6 mm	104	—	L8.110.0.16.2, L8.110.0.16.6, L8.110.0.71.2
30 mm	8 mm	51	—	L8.113.0.16.6, L8.113.0.71.6, L8.113.0.87.6
31 mm	8 mm	9	—	L8.115.4.61.6, L8.115.4.67.6, L8.115.4.71.6
34 mm	8 mm · 9 mm on 8	16	—	L8.126.0.71.6, L8.126.0.97.2, L8.126.4.71.2

References that take a different watch strap

L8.114.0.16.6: 9 mm, not the 8 mm of most 34 mm cases
L8.114.0.71.6: 9 mm, not the 8 mm of most 34 mm cases
L8.114.0.87.6: 9 mm, not the 8 mm of most 34 mm cases
L8.114.4.16.6: 9 mm, not the 8 mm of most 34 mm cases
L8.114.4.71.6: 9 mm, not the 8 mm of most 34 mm cases
L8.114.4.87.6: 9 mm, not the 8 mm of most 34 mm cases
L8.116.4.71.6: 9 mm, not the 8 mm of most 34 mm cases
L8.116.4.87.6: 9 mm, not the 8 mm of most 34 mm cases

Questions about the Longines PrimaLuna

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

No. The lug width changes with the case size: the 23 mm case takes 6 mm, the 27 mm case takes 6 mm, the 30 mm case takes 8 mm, the 31 mm case takes 8 mm and the 34 mm case takes 8 mm. Check your case diameter before you buy.