Circular Satin-brushed “Jacob&Co“ Upper Bridge of the Tourbillon Cage; Bridges: Satin-finished, Hand-polished Angles, Drawn-finished Flanks; Bridges Set with 346 Brilliant-cut Pink Sapphires (≈ 1.5ct.); Power Reserve Indication Set with 8 Multi-coloured Brilliant-cut Sapphires (≈ 0.05ct.).