JLC 410

The JLC 410 (and similar) are the original movements for the Jaeger-LeCoultre Reverso watch.

Introduced in 1933, the 410 and 411 calibres were specially designed to fit in the Jaeger-LeCoultre Reverso watch. A 17 jewel movement, the 410 was extremely compact and tonneau shaped for the rectangular Reverso. Prior to this introduction, Jaeger-LeCoultre fitted the Reverso with Tavannes movements.

All movements in this family share the same basic design and dimensions. They measure 8 by 11 lignes (17.85 mm by 24.55 mm), and are 3.35 mm thick. They have 17 jewels and operate at 18,000 A/h.

The main difference between these movements are as follows:

• JLC 410, 11LO, 413, 424, 438 - Small seconds
• JLC 411, 437 - Sweep seconds
• JLC 412, 436, 486, 806 - small seconds and date