Jacob & Co. Brilliant Flying Tourbillon Purple Degrade 47 mm watch. Model reference: BT543.30.SX.UC.B. 18K white gold case set with 170 baguette blue and purple sapphires, baguette rubies, and baguette diamonds. Dial set with 146 baguette blue and purple sapphires, baguette rubies, and baguette diamonds. Manual-winding movement. White alligator leather strap. 18K white gold pin buckle set with 21 baguette sapphires.