Breguet CLASSIQUE DOUBLE TOURBILLON 5345 Mode D'emploi page 9

When the watch stops
To ensure that the watch functions perfectly it should be
English
rewound every day.
When the watch is not rewound it will stop after about
50 hours.
Since each tourbillon possesses its own power reserve,
it is possible that when the watch stops, one of the
tourbillons continues to function on its own for several
hours. During this period the watch is not guaranteed to
function correctly.