Jaeger-LeCoultre Duomètre

Most Jaeger-LeCoultre Duomètre references take a 20 mm watch strap: 22 of 30. The lug width follows the case size: 41 mm case → 20 mm, 42 mm case → 20 mm and 43 mm case → 21 mm.

Shop 19 mm Shop 20 mm Shop 21 mm

Jaeger-LeCoultre Duomètre lug width by case size

30 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
41 mm	20 mm · 14 mm on 1	3	—	6042421, 60435E1
42 mm	20 mm · 21 mm on 3 · 19 mm on 1	22	—	6012421, 601244J, 6012521
43 mm	21 mm	3	—	Q604848J, Q622252J, Q622656J
44 mm	20 mm	2	—	6033420, Q6202420

References that take a different watch strap

6043420: 14 mm, not the 20 mm of most 41 mm cases
6012420: 21 mm, not the 20 mm of most 42 mm cases
604242J: 21 mm, not the 20 mm of most 42 mm cases
6042522: 19 mm, not the 20 mm of most 42 mm cases
6062420: 21 mm, not the 20 mm of most 42 mm cases

Questions about the Jaeger-LeCoultre Duomètre

Can two Jaeger-LeCoultre Duomètre watches with a 42 mm case take different watch straps?

Yes. Of the 22 Jaeger-LeCoultre Duomètre references with a 42 mm case, 18 take 20 mm, 3 take 21 mm and 1 take 19 mm. The reference number decides, not the case size alone.