HMC 903

The hand-wound HMC 903 calibre measures 33.0 mm by 9.62 mm, operating at 21,600 vph with 34 jewels and a 90-hour power reserve. It features hand-finished double Moser stripes, a one-minute flying tourbillon with a skeletonised bridge, and a minute repeater. Created with MHC Manufactures Hautes Complications SA, the design displays the chimes and hammers on the dial side, requiring curved chimes to clear the flying tourbillon while maintaining an understated aesthetic. Additional: Tourbillon Escapement.