The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Sixth International Congress of Heraldry and Genealogy. Edinburgh. 1962. Arms of the Duke of Hamilton as President of the Congress. Armorial Series of Heraldic Postcards No. 3
Berlin. Internationales Congress Centrum. Alfred Ziethen. Azet Color
The Congress Hall. Imperial International Exhibition. London. 1909. Valentines
Congreso Nacional. Bs. As. Congress Hall House of representatives
Birmingham. The International Convention Centre. J. Salmon
Liechtenstein. Special Stamps International Issue. 50 th Anniversary of the International Radio Consultative Committee. CCIR. 1979
Mountain Locomotive by Haswell of Vienna. Locomotives at The Great International Exposition. Paris. 150 Years of Railway History. Our Iron Roads. Bridgnorth. Salop. Prescott Pickup
