Caliber Jaquet Droz caliber 26MR monopusher column wheel chronograph with
link vertical clutchFunctions time retrograde date display in large subdial 30 minute chronographPower Reserve 40 hoursWinding
link automaticFrequency 21600 vphJewels 34 jewelsAdditional Details
link silicon balance spring and pallet horns freesprung adjustable mass balance openworked 18k gold oscillating mass on all models including steel