The dial of the Histoire de Tourbillon 5 is cut in several places to better reveal the watch’s movement. Photos courtesy Harry Winston.

The unusual Histoire de Tourbillon 3 comes with a square case overlaid with a circle.

BY LESLIE JORDAN CLARY

Harry Winston’s Histoire de Tourbillon 5 is the latest addition to the Histoire series. In a departure from earlier designs, the newest watch uses a more traditionally round case to hold the tri-axial tourbillon with carriages that rotate in 45 seconds, 75 seconds, and 300 seconds, respectively. The No. 5 is the second watch to use this tri-axial tourbillon, which was first introduced in the Histoire de Tourbillon 4. Two off-center disks show the hour and minutes, and a power reserve indicator is in the upper left corner.

—Jan. 5, 2015