RTL, one of the most powerful transmitters on long wave went “off air” with their French programme from Luxembourg on January 2nd this year to save electricity. The percentage of listeners on long wave didn’t justify the electricity bill, which equalled the power consumption of 3000 people. So this is probably one of their last QSL cards for the Beidweiler station… I feel sad, as this was one of the stations on the long wave dial of my first receiver, the Nordmende Traviata (as you can see on the header picture of this blog).
More about the history of this station: https://en.wikipedia.org/wiki/Beidweiler_Longwave_Transmitter

QSL RTL Beidweiler 234 kHz