Excalibur Spider RD105SQ Double Tourbillon Carbon/18k Rose Gold (28pc)

A high-complication Excalibur Spider in 47mm carbon with an 18K rose gold bezel, this openworked model runs the hand-wound RD105SQ double flying tourbillon caliber, in which two tourbillon carriages are linked by a differential that averages their rate for improved precision. A fuel-gauge-style…

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