The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
The Baptism of Christ. Piero Francesca. National Gallery Publications
National Gallery. The Baptism of Christ. Henry Stone. Card No. 1198. Piero Della Francesca
The National Gallery. Baptism of Christ. Della Francesca. The Great Artists. The Bridgeman Art Library
London. The National Gallery. Baptism of Christ. Bridgeman Art Library. Piero Della Francesca
London. The National Gallery. Baptism of Christ. Della Francesca. Piero. The Great Artist. The Bridgeman Art Library
The Virgin and Child with Saint Anne and Saint John the Baptist. National Gallery Publications. Card No. 1325. Leonardo da Vinci
Leonardo da Vinci. The Virgin and Child with SS Anne and John the Baptist. National Gallery