JLC 470

Calibre 470 was a chronometer-grade hand winding movement from Jaeger-LeCoultre.

Originally used in the military Mark 7 A, Calibre 470 was a hand-winding movement with great precision. It evolved into the Calibre 488 SBr, used in the Mark 11, which added hacking seconds. Calibre 468 was similar. The next revision was Calibre P 478 BWSBr, the movement used in the legendary Jaeger-LeCoultre Geophysic chronometer of 1958. The 478 added shock protection and a swan neck regulator but was otherwise similar to the 488.

Manufacturer: Jaeger-LeCoultre Description: Hand-winding movement Functions: Hour, minute, central seconds Hacking (488, 478) Data: Diameter: 12.75 lignes, 28.8 mm Height: 4.55 mm 15, 16, or 17 jewels 18,000 A/h Power reserve 40 Hours Production period: 1940's