As I understand it, the full name of this coachbuilder was "Maison Mich Conrardy-bintner"
9 Rue Henri VII Limpertsberg, Luxembourg. In operation from 1933-1947.
I assume this is the same Conrardy that built the car in your quiz photo.
I could not find your photo and the only other photo I found was a very tiny photo of a hearse from the early 1930's on a site devoted to the history of metal working companies in Luxembourg.
Even searching Google.lu only turns up this same photo and the same website.
If you have further information, it would be most valuable.
Bill