A dial and oscillating weight cut from a disc of aventurine now graces the Grande Seconde Tourbillon, Jaquet Droz’s legendary timepiece. For the very first time, the spellbinding display of its tourbillon is enhanced by the poetic, mineral glitter of a star-strewn night sky. - See more at: http://watchmobile7.com/articles/jaquet-droz-grande-seconde-tourbillon-aventurine#sthash.DPh0WRit.dpuf

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