The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Model of a LMS Travelling Post Office from the Reign of George V
Mails For the Packets Arriving at Falmouth. 1833. H. S. Williamson. Principal of the Chelsea School of Art. From the Post Office Archives Poster Artwork Collection. Clement and Foster Printers
London by Night from the Post Office Tower. W. W. Roberts B. A. F. R. P. S. Lon 6466. J. Arthur Dixon
Christmas Card To the Paddington District Office From the Post Office at Stafford. National Postal Museum. Fulmar Colour Printing
Model of a L. M. S. Travelling Post Office From The Reign of George V. National Postal Museum. Dolomite Printing
London. King Edward Building. National Postal Museum. The Penny Black. From The Post Office Collection
Boulogne sur Mer. View Taken from Post Office. LL. No 352