JACOB & CO. / BT545.30.BB.BB.A
Brilliant Tourbillon Art Deco — Blue Sapphire47 mm18K White GoldPiéce UniqueEra not confirmed
Jacob & Co. / Reference archive
Brilliant Tourbillon Art Deco
Official Jacob & Co. reference catalogue.
JACOB & CO. / BT545.30.BD.RP.A
Brilliant Tourbillon Art Deco — D-Flawless47 mm18K White GoldPiéce UniqueEra not confirmed
JACOB & CO. / BT545.40.RD.AA.A
Brilliant Tourbillon Art Deco — Full Diamond Pave18K Rose Gold;18 PiecesEra not confirmed
JACOB & CO. / BT545.40.SP.RB.B
Brilliant Tourbillon Art Deco — Pink Sapphire47 mm18K Rose Gold18 PiecesEra not confirmed
Photographs follow the cited record. Shared source illustrations are labelled. “Current” and “Historical” are shown only where the source supports that classification; other entries are marked “Era not confirmed”. Catalogue coverage & sources