The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
5. The idea of an Ocean Penny Postage came from an American. Elihu Burritt. 1980 Stamp Collecting magazine
4. The idea of an Ocean Penny Postage came from an American. Elihu Burritt. 1980 Stamp Collecting magazine
3. The idea of an Ocean Penny Postage came from an American. Elihu Burritt. 1980 stamp Collecting magazine
The Idea of an Ocean Penny Postage Came from an American. Elihu Burritt. U. S. Consular Agent in Birmingham. Stamp Collection Magazine. 1980
The idea of an Ocean Penny Postage Came from an American. Elihu Burritt. U. S. Consular Agent in Birmingham. Stamp Collecting Magazine. 1980
One Penny. The Idea of an Ocean Penny Postage Came from an American. Elihu Burritt. U. S. Stamp Collection Magazine. 1980