Congrats, Ms Cringe, 'tis indeed a
Breguet Br-901 (in German)
The link with the cousins on the far side of the pond is the excellent
Paul McCready (see also
here), one of the most successful fathers of the
human powered and
solar powered flight.
Glider pilots know him better for his theory of cross-country flight optimization, which lead to the McCready ring and hence to his victory in the
1956 world gliding championships, on a Br-901