JLC 470

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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