Out of curiosity, I’ve created an account on FlightRadar24 (FR24) and checked the history for the day in question. I think I found the other plane, a PC-12 from a fractional-ownership firm. To be more specific, I didn’t find an exact track matching, but a flight from Geneva toward the general Courchevel area about an hour before I “met” the plane, at 7500 ft, with the same routing (the plane...