Jaeger-LeCoultre 985

The Jaeger-LeCoultre caliber 985 is an automatic mechanical movement. It comprises 431 parts, operates at 28,800 vibrations per hour, and delivers a 45-hour power reserve. The movement features a flying tourbillon with cylindrical spring, a perpetual calendar displaying day, month, date, and four-digit year, plus moon phases. It is featured in the Master Grande Tradition Tourbillon Cylindrique Quantième Perpétuel.