Caliber: Jaquet Droz caliber 26MR, monopusher, column-wheel chronograph with vertical clutchFunctions: Time, retrograde date display in large
link sub-dial, 30-minute chronographPower Reserve: 40 hoursWinding:
link AutomaticFrequency: 21,600 vphJewels: 34 jewelsAdditional Details: Silicon balance spring and pallet horns; freesprung, adjustable mass balance; openworked 18k gold oscillating
link mass (on all models, including steel)