The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Koln. Hahnentor
Hahnentor. Koln. Karl Rud. Bremer
Koln. Hahnentor. Karl. Rud Bremer
Koln. Hahnentor. Serie Iris. J. W. B
Koln. Hahnentor. K. T. F. Photogravur. 1919
