Jaeger-LeCoultre caliber 978B

Ref. 978B

The Jaeger-LeCoultre caliber 978B is an automatic movement with a 38-hour power reserve, beats at 28,800 vph, and carries 33 jewels.

Mechanical automatic winding movement, 302 parts, 28,800 vibrations per hour, 48-hour power-reserve. Indications for local hour, minute, 24-hour reference time, tourbillon regulator with seconds indicator, jumping-hand date display.