On Aug 3, 2022 I took some photographs of Xemh 4/4 no. 4 in St. Gervais les Bains - Le Fayet train station. No company whatsoever running the motor car was inidicated on it. According to railfaneurope.net there exists only one such motor car, running for TMR / Switzerland, but that unit is no. 6. Any help with more information about this motor car is much appreciated.
First information is that it will operate on the SNCF Ligne de Cerdagne, with maintenance still taking place at the TMR workshop in Switzerland that rebuilt the motor car.

Photo by Martin Greiner (ma-il.greiner@gmx.de)