The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
London. National Gallery. The Guitar Lesson. Woman Playing Guitar. Terborch. B. Matthews
National Gallery. The Lesson. Chardin. Waterlow
National Gallery. The Lesson. Waterlow and Sons Limited. Chardin. No. 1095
The Annunciation. National Gallery. Card No. 1148. Lippi Fra Filippo
The Thames below Westminster. National Gallery. Card No. 1465. Monet. Claude Oscar
The Thames Below Westminster. National Gallery. Card No. 1465. Oscar Monet Claude
The Beach at Trouville. Monet. Claude Oscar. The National Gallery. Card No. 1306. Postcard