Peter: We initially used modified tourbillon calibers from Progress, but that business was sold and renamed STT. As we gained more experience as a manufacture, we became confident that we would also be able to make our own tourbillon. Aletta: Our “Heart Beat Tourbillon” debuted in a limited edition of 188 watches in 2008. Peter: This movement has several special features, e.g. the socalled “Smart Screw” system to perfectly balance the rotating cage. The complex automatic caliber FC9801 also has an antimagnetic silicium escapewheel. No Fields Found.