The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Koln Rhein. Cathedral and Gross St. Martin. Ziethen. Horst Ziethen. Multi View
Koln. Rhein. Cathedral and Gross St. Martin. Ziethen. Horst Ziethen. Multi View
The Cathedral of Cologne. Koln am Rhein. Dom. Sudseite. Hans Ziethen
The Cathedral of Cologne. Koln am Rhein. Dom. Hans Ziethen
Cologne. Rhine. Cathedrale and Gross St. Martin. Ziethen
Koln. Cologne. Cathedrale. Jos. Kessel. Nr. 2070
Koln am Rhein. The Cathedral of Cologne. Hans Ziethen
Koln am Rhein. The Cathedral of Cologne. Horst Ziethen