JLC 818 is a manual movement from Jaeger-LeCoultre.
Production of the Calibre 818 began in 1959 for a line of slim dress watches. It is very small, with a diameter of 20.9 mm, and a height of 2.94 mm. It is an 18,000 vph movement.
Calibre 818/4 has 18 jewels, while Calibre 818/5 has 21 jewels.
Calibres 818 and 819 were used by Chopard and Vacheron Constantin in addition to Jaeger-LeCoultre.
Calibre 819 is very similar to Calibre 818 but with central seconds.