YEMA · Spacegraf Heure Sidérale Tourbillon Volant Millésime 2026
The model in detail
Two different rhythms meet on the Spacegraf dial: an exposed flying tourbillon below and a slowly rotating celestial disc above. The latter follows a sidereal day of 23 hours, 56 minutes and 4 seconds, the Earth’s rotation period relative to the stars. YEMA links the design to the Besançon Observatory and the tradition of checking watches through astronomical observation.
EnlargeThe blue CMM.32 bridges carry constellation engravings; the tourbillon is visible through the sapphire back.
© © YEMA · SourceThe hand-wound CMM.32 provides 105 hours of power reserve. Its Grade 5 titanium case measures 42mm across and 12.15mm thick, with 100m water resistance. The US website lists $16,000; production is limited to 150 numbered watches, with shipping promised for December 2026. The celestial disc glows in the dark alongside the hands and markers.
