Tourbillon Musical Watch

The $290,000 Corum Admiral’s Cup Minute Repeater Tourbillon 45 ( www.corum.ch ), a special-edition minute repeater tourbillon that marks the 50th anniversary of the manufacturer’s Admiral’s Cup watch...
Although it carries a tourbillon escapement and perpetual calendar, the real attraction of the 2755 is the new minute-repeater mechanism with silent regulator. Finally, Vacheron Constantin's movement...
The 5207 Grand Complication features the base movement from the firm’s 3939 minute repeater/tourbillon, but the perpetual-calendar module is a completely new development that makes two improvements...