That jeton come from one of these cities casinos in Niedersachsen German region controlled by Spielbanken Niedersachsen company.

Bad Bentheim
Bad Harzburg
Bad Pyrmont
Bad Zwischenahn
Göttingen
Hannover
Norderney
Osnabrück
Seevetal
Wolfsburg

For more details take a look here: http://www.spielbanken-niedersachsen.de/

Ciao ;)
Alessandro