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Jaeger-LeCoultre Master Control

Most Jaeger-LeCoultre Master Control references take a 20 mm watch strap: 36 of 37.

Shop 18 mmShop 20 mm

Jaeger-LeCoultre Master Control lug width by case size

37 references measured. Updated 2026-10-29.

CaseLug widthReferencesWatch strap attachmentFor example
36 mm18 mm1—Q4008520
39 mm20 mm6—1542520, 1548120, 1548171
40 mm20 mm29—4018420, 4018480, 410257J
not recorded20 mm1—Q413843J

Every Jaeger-LeCoultre Master Control reference

Other Jaeger-LeCoultre families

Inside each one the lug width often changes: it is the reference that decides.

All Jaeger-LeCoultre families → · Why the size changes inside a family →