Jaeger-LeCoultre 978B

The Jaeger-LeCoultre 978B is an automatic movement featuring a tourbillon and a jumping-date complication. It operates at 28,800 vibrations per hour with a 48-hour power reserve and comprises 302 components. The movement indicates local time, a 24-hour secondary time zone, and includes a tourbillon regulator with seconds display. It is produced in-house and currently powers the Master Tourbillon line in pink gold, white gold, and diamond-set configurations.