The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
National Gallery. Official Series No. 257. Gozzoli. Rape of Helen. 591. Rembrandt Photogravure
National Gallery. The Rape of the Sabine Women. Rubens. Peeter Pauwel. Card No. 1359
National Gallery. The Rape of the Sabine Women. Card No. 1359. Peeter Pauwel Rubens
London. The National Gallery. Raphael. The Pope Julius II. LL. 295
London. Trafalgar Square. Prison Monument. The National Gallery. Raphael Tuck and Sons. Oilette. Postcard 7857. 1923
National Gallery. The Herring Packers Tower. Amsterdam. Hobbema. Meindert. Card No. 1187. Henry Stone
London. National Gallery. The Head of Venus. Medici Society Ltd. Sandro Botticelli
The National Gallery. The Raising Lazarus. Sebastiano. Del Piombo