And four adjustment keys for the complicated movement.
Girard-Perregaux unveiled the company's most cosmic watch in 2019 — a model with two rotating globes on its dial. They may seem to rotate at the same speed at first glance but there's one critical difference.
The terrestrial globe serves as the day/night indication by completing a full rotation in exactly 24 hours, while the celestial one displaying the constellations reflects a sidereal day, which is three minutes and 56 seconds shorter.
It's hard to imagine why an ordinary watch owner would want to keep track of the time it takes the Earth to complete a rotation on its own axis relative to distant stars (i.e., a sidereal day), but having the two globes rotate at the correct speed is an impressive feat nonetheless.
Moreover, the rotating terrestrial and celestial globes look stunning, especially accompanied by the tourbillon at 6 o'clock. Each case version used for Cosmos watches has been perfectly smooth: that goes for the original model from 2019, the 2020 Infinity Edition, and the three models launched in 2022 —the subject of this piece.
Even with its wealth of functions, there aren't any pushers or a winding crown for making adjustments. All functions are controlled by four adjustment keys integrated into the caseback. Three novelties have inherited the model's key traits this year as the swansong of the Cosmos series.
The thing that makes these three unique watches special is how their dials are composed from different minerals. One of the dials is made of black aventurine, another uses blue spectrolite with aventurine globes and the third dial is made of obsidian with onyx globes. The case for all dial versions is made of titanium and measures 47 mm in diameter and 22.20 mm in height.
The hand-wound GP093020 movement is true to the spirit of Girard-Perregaux. The tourbillon has a lyre-shaped cage, held in place by a black sandblasted PVD-treated Neo Bridge. Its creators have borrowed both of these details from the architecture of the famous "La Esmeralda" pocket watch.