The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Windsor. Changing the Guard. State Apartments. River Thames and Windsor. The Round Tower. The Photographic Greeting Card Co. Ltd. London. APR 1969
Windsor. Round Tower from the air. Charles Skilton
Windsor. Round Tower from the Air. Charles Skilton and Fry
The Round Tower From Winchester Tower. H. M. Queen Elizabeth II
The Round Tower. Windsor Castle. RP
Windsor from the River. Hartmann
The Round Tower. Windsor Castle. Salmon. No 4139
The Round Tower. Windsor Castle. R.A.P. Co Ltd