The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Dover Castle. Kent. Air View. Aerofilms. Ministry of Works
Kent. Walmer Castle. Air View From the South East. HMSO. Larkfield Printing. Crown
Walmer Castle. Kent. Air view from sout east. Department of the Environment. Crown. H. M. S. O by Colin Richardson Printers Ltd
Kent. Dover Castle. Air View. Aerofilms Ltd. 1959
Warwickshire. Kenilworth Castle. Air View. Aerofilms. W. S. Cowell
Walmer Castle. From The Air. Air View. Aerofilms Series