As a long-time collector of Luxembourg railway cancels, I can't recall ever before seeing a railroad cancel rendered in manuscript. But here is a recently-acquired 5c Allegory (3rd series) postal card with such a cancel from the Echternach-Ettelbrück TPO.
This rail line made its way from Echternach to Ettelbrück, passing by Weilerbach, Bollendorf, Grundhof, Dillingen, Wallendorf, Reisdorf, Moestroff, Bettendorf, and Gilsdorf.
Here's an example of the cancel:
Why was the card uprated to 10 centimes?
The card is uprated to ten centimes, so I assume the destination was the village of Bollendorf in Germany on the left bank of the Sauer river, opposite Bollendorf-Pont on the Luxembourg side.
The addressee is a Mademoiselle Barreau, perhaps residing at the Bollendorf Waldvilla Barreau seen on the postcard below:
This card would fit nicely into an exhibit of either railway cancels or Allegory postal stationery. Maybe that's why it was so expensive!