H. Moser & Cie caliber HMC 903

Brand:H. Moser & Cie
Reference:HMC 903
Hands:Hours, Minutes
Acoustic:Minute Repeater
Additionals:Tourbillon Escapement


Hand-wound HMC 903 calibre
Diameter: 33.0 mm/height: 9.62 mm
Frequency: 21,600 Vib/h
34 jewels
Power reserve: minimum 90 hours
Double Moser stripes on the plate and bridges
Movement and components hand-finished and decorated
One-minute flying tourbillon at 6 o'clock with skeletonised bridge
Minute repeater

To develop this marvel of ingenuity, H. Moser & Cie. drew on the expertise of MHC Manufactures Hautes Complications SA, a specialist in minute repeaters. Together, the two manufactures created a brand-new design, showcasing the beauty of the complication by positioning the chimes and the hammers on the dial side. This involved overcoming many technical challenges. In particular, the chimes (which are placed on one level to preserve the finesse of the piece) had to be curved so as not to interfere with the flying tourbillon and to respect H. Moser & Cie.'s main focus to keep the design understated.

All watches using this caliber: