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
“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