The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Sussex. The Royal Greenwich Observatory. Colin Richardson Printers
Royal Greenwich Observatory. Sussex. Isaac Newton Telescope. Colin Richardson
Sussex. The Royal Greenwich Observatory. Herstmonceux Castle. Colin Richardson Printers. 1976
Sussex. The Royal Greenwich Observatory. The Dome of the Isaac Newton Telescope. Colin Richardson Printers Limited
Sussex. The Royal Greenwich Observatory. The Dome of the Isaac Newton Telescope. Colin Richardson Printers
Royal Greenwich Observatory. at Herstmonceux Castle. East Sussex. Royal Mail Postcard
The Royal Greenwich Observatory. East Sussex. Herstmonceux Castle from the South east. Judges
