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