Ths specific German Reich stamp has a unique
railway station/bahnhof cancel from Szczecin in West Pomerania (Poland). Germany had to cede this region to Poland after WWII. Its German name is Stettin.
Printed at Preußische Staatsdruckerei, Berlin
Michel DR21, relief eagle with somewhat smaller shield than standard
There are three colour variants: a (reddish-orange brown), b (lila-purple brown), and c (clear brown). I do not know the colour shade so I included scans from two copiers and a mobile phone picture for you to assess yourself.