The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Coln a. Rh. Rheinufer. Heiss and Co. Graph Kunstanstalt. Coln. Lindenthal
Coln a. Rh. Rheinufer. Heiss
Coln a. Rh. Rheinufer. Heiss. 1919
Coln a. Rh. Rheinufer. 154. Heiss. Coln Lindenthal
Der Rhein. Coln. Heiss
Coln a. Rhein. Heiss and Co
