The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Windsor Castle. Round Tower and Edward III Tower. Valentine. Phototype
Round Tower and Edward III Tower. Windsor Castle. H. 2420. Valentines. RP
Round Tower and Edward III Tower Windsor Castle Valentines RP
Windsor. Round Tower. Windsor Castle. Floodlit. Charles Skilton and Fry
Windsor Castle. The Round Tower and Henry II. Tower. Excel Series. RP
1975. Windsor Castle. Berkshire. Scot Guards. Castle Hill. Round Tower. Arthur Dixon. 21540