| Manufacturer | H. Moser & Cie |
| Caliber Number | HMC 804 |
| Movement Type | Automatic, self-winding mechanical, tourbillon |
| In-House? | Yes |
| Diameter | 32mm |
| Height | 5.5mm thick |
| Jewels | 28 |
| Components | (Needs confirmed) |
| Vibrations Per Hour | 21,600 bph (3 Hz) |
| Power Reserve | 72 hours |
| Rotor Winding Direction | Bi-directional (pawl style) |
| Functions | Central hours; central minutes |
| Features | Double hairspring flying tourbillon |
| Country of Manufacture | Switzerland, 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.
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
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