Here a better Picture. It is the Banner of
Ferdinand Lassalle, which was the first used Flag of the
ADAV the successor of the
SPD.
It shows the german translation of "Liberty, Equality, Fraternity!", the Motto of the French Revolution, the symbol of shaking hands with the date of the beginning of Lassalle's presidentship and the german sentence "Unity makes powerful!" on red ground.
The Banner was designed by workers from Katowice and was homemade by 1864, then handed out to Lassalle as a gift. The original survived the time and both world wars, being exhibited in a museum in Wroclaw in present days.
However you can find copies of the banner everywhere in Germany, for example pubs oftenly exhibit a copy together with other worker banners (we have many of them) or catholic banners. However we germans do have an general illness to like banners of any kind...
Bookmarks