Jaeger LeCoultre Master Compressor Extreme LABReference: Q179T470. MOVEMENT: Mechanical automatic, Jaeger-LeCoultre Calibre 988C. 28,800 vibrations per hour, 4 hertz. Diameter 30.0 mm. Thickness 7.05 mm. Iridium platinum oscillating weight with carbon base. Black diamond pallet-stones. Easium jewels. 48-hour power reserve. Tourbillon with magnesium carriage. FUNCTIONS: Hour, minutes, seconds,