The Co-Axial tourbillon is one of the few variants of the single axis tourbillon mechanism where the balance wheel pivots around the same axis as the entire tourbillon itself.

Link to stl files : https://mmf.io/mechttpremcfxex
Link to Assembly guide: https://drive.google.com/file/d/1W1Fm...

The tourbillon model is a small part from my first-ever crowdfunding campaign for the Tourbillon Mechanica Tri-Axial at MyMiniFactory, launching on April 12th. More details in the stl file link above.