Jaeger-LeCoultre Master Grande Tradition

Most Jaeger-LeCoultre Master Grande Tradition references take a 20 mm watch strap: 30 of 38.

Shop 18 mm Shop 19 mm Shop 20 mm Shop 22 mm

Jaeger-LeCoultre Master Grande Tradition lug width by case size

38 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
39 mm	20 mm · 18 mm on 1	3	—	5092420, 5092520
42 mm	20 mm · 22 mm on 4	17	—	5063540, 50635SQ, 5073401
43 mm	20 mm · 22 mm on 2	7	—	1662510, 500242A, 5253420
44 mm	20 mm	10	—	5012550, 5022480, 5022580
45 mm	19 mm	1	—	Q52624A3

References that take a different watch strap

50924E1: 18 mm, not the 20 mm of most 39 mm cases
Q4202480: 22 mm, not the 20 mm of most 42 mm cases
Q5242461: 22 mm, not the 20 mm of most 42 mm cases
Q5246508: 22 mm, not the 20 mm of most 42 mm cases
Q5246580: 22 mm, not the 20 mm of most 42 mm cases
Q5233420: 22 mm, not the 20 mm of most 43 mm cases
Q5273480: 22 mm, not the 20 mm of most 43 mm cases

Questions about the Jaeger-LeCoultre Master Grande Tradition

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

Yes. Of the 17 Jaeger-LeCoultre Master Grande Tradition references with a 42 mm case, 13 take 20 mm and 4 take 22 mm. The reference number decides, not the case size alone.