Marking the first time that Cartier associates a Mysterious Complication with a Minute Repeater, this is a double complication like no other. The new Rotonde de Cartier Minute Repeater Mysterious Double Tourbillon. Fitted with a measuring 45 mm in diameter and a mere thickness of 11.15 mm, this new watch is powered by the new Cartier in-house calibre 9407MC.