Caliber: Jaquet Droz caliber 26MR, monopusher, column-wheel chronograph with vertical clutchFunctions: Time, retrograde https://zzb.bz/TQ1pi9 link date display in large sub-dial, 30-minute chronographPower Reserve: 40 hoursWinding: AutomaticFrequency: 21,600 vphJewels: 34 https://is.gd/0TPxFY link jewelsAdditional Details: Silicon balance spring and pallet horns; freesprung, adjustable mass balance; openworked 18k gold oscillating mass (on all models, https://tinyurl.com/2p9tk5nt link including steel)

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