H Moser Caliber Hmc 804

H. Moser & Cie Caliber HMC 804

H Moser Caliber Hmc 804

ManufacturerH. Moser & Cie
Caliber NumberHMC 804
Movement TypeAutomatic, self-winding mechanical, tourbillon
5.5mm thick
(Needs confirmed)
Vibrations Per Hour
21,600 bph (3 Hz)
Power Reserve
72 hours
Rotor Winding DirectionBi-directional (pawl style)
FunctionsCentral hours; central minutes
Features Double hairspring flying tourbillon
Country of ManufactureSwitzerland, Swiss made
Known Models
H. Moser & Cie Streamliner Tourbillon Vantablack (Ref: 6804-0400)

The H. Moser & Cie caliber HMC 804 is an in-house automatic tourbillon movement.

This calibre is found in the Streamliner Tourbillon Vantablack which was launched on August 24, 2022.

H Moser Cal Hmc 804

In H. Moser’s own words:

“The HMC 804 is an automatic tourbillon movement which counteracts the effects of gravity in two ways: the one-minute flying tourbillon, and the patented double hairspring where two identical hairsprings compensate for any positional errors.” –source

And this:

“Conceived to counteract the effects of gravity on the watch’s timekeeping precision, the tourbillon is a device in which the regulating organ and escapement are placed, which constantly rotates around a central axis to eliminate any positional errors.” -same source

H Moser Caliber Hmc 804 Tourbillon

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