Jaeger-LeCoultre Duometre Q6012421
The Jaeger-LeCoultre Duometre Q6012421 takes a 21 mm watch band.

Jaeger-LeCoultre · Duometre
- Lug width
- 21 mm
- Case diameter
- 42 mm
- Reference
- Q6012421
- Family
- Duometre
- Water resistance
- 50
- Model
- Duometre Q6012421
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Will a strap close on your wrist?
Set for this watch: 42 mm of case and 21 mm between the lugs. Add your wrist and see where a standard strap would close.
mm
Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
Sizing notes
- 21 mm is the gap between the lugs, so a 21 mm band goes in without adapters. Whether it sits flush against a 42 mm case depends on how that case is shaped.
- 21 mm is an odd size: most ready-made bands are made in even widths, so this reference needs one cut to measure or a band that runs in odd sizes. Why some watches take odd sizes →
- 21 mm is not a common size: only 2,956 of the 41,485 watches measured take it (7.1%), so ready-made choice at this width is narrower than at 20 or 22 mm. Every watch that takes 21 mm →
Same lug width, other Jaeger-LeCoultre lines
- Master Ultra Thin Small Seconds Pink Gold - Diamond / Eggshell / Alligator1212501
21 mm - Master Ultra Thin Small Seconds Pink Gold / Eggshell / Alligator1212510
21 mm - Master Ultra Thin Small Seconds Stainless Steel / Silver / Alligator1218420
21 mm - Master Ultra Thin Date Red Gold - Diamond / Eggshell / Alligator1232501
21 mm - Master Ultra Thin Date Pink Gold - Diamond / Eggshell / Alligator1232502
21 mm - Master Ultra Thin Date Pink Gold / Eggshell / Alligator1232510
21 mm
Millenium Cognac Alligator Strap
Matte Blue Alligator Strap
Matte Grey Alligator Strap
Hammered Yellow Strap with Ecru Stitching
Grand Cavalier Leather Strap Orange