The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Sussex. Herstmonceux Castle. John M. Duly
Herstmonceux Castle. 1905
Herstmonceux Castle. 1906
Herstmonceux Castle. 1935
Herstmonceux Castle. Judges
Herstmonceux Castle. Judges. C. 366
Herstmonceux Castle. Judges Limited. C 7639 X