Jaeger-LeCoultre Master Ultra Thin 1338421

The Jaeger-LeCoultre Master Ultra Thin 1338421 takes an 18 mm watch band.

Jaeger-LeCoultre · Master Ultra Thin

18mm

lug width

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Every watch that takes 18 mm →

Lug width: 18 mm
Case diameter: 41 mm
Reference: 1338421
Family: Master Ultra Thin
Case material: Acciaio
Year: 2013

Bands that fit

Cut and stitched in Milano, in the width this watch takes.

Millenium Cognac Alligator Strap€195

Millennium Green Alligator Strap€195

Matte Dark Brown Alligator Strap€195

Grey Hammered Leather Strap with Ecru Stitching€98

Hammered Calfskin Strap Light Blue€98

See every 18 mm band →

Will a strap close on your wrist?

Set for this watch: 41 mm of case and 18 mm between the lugs. Add your wrist and see where a standard strap would close.

Your wrist

Watch length, lug to lug

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.

Why ready-made straps come in one length →

Sizing notes

18 mm is the gap between the lugs, so a 18 mm band goes in without adapters. Whether it sits flush against a 41 mm case depends on how that case is shaped.
Inside the Master Ultra Thin family the lug width is not one number: it runs 17, 18, 20, 21, 22 mm. This reference is the 18 mm one, so a band bought for another Master Ultra Thin may not fit it. Why the size changes inside a family →
18 mm is not a common size: only 3,965 of the 41,485 watches measured take it (9.6%), so ready-made choice at this width is narrower than at 20 or 22 mm. Every watch that takes 18 mm →