Caliber: Zenith El Primero https://zzb.bz/YzU1gF link caliber 3610Functions: Complete calendar (Day, date, month), moonphase; chronograph that measures to 1/10th of second https://v.gd/9WAMDa link (rotates fully around dial every 10 seconds)Diameter: 30mmPower Reserve: 60 hoursWinding: AutomaticJewels: 35Frequency: 5 https://is.gd/mTessR link Hertz (36,000 beats per hour)Additional Details: Column-wheel El Primero chronograph

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