Series information :
- Date of issue : ?
- Number of cards : ?
- Image variants : ?
Siegerin was a German producer of margarin, located in ?.
The company issued a number of series with advertising stamps, one of those series showed the arms of German cities. Other series showed for example important monuments in German cities or famous persons, see examples below.
I have no idea how many stamps were actually issued, as they are not numbered.
For all known stamps see here.