The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Chancery Lane. Towers of the Public Record Office. David Gentleman. Crown 1986. P. 28. Postcard
Boston Rubber Shoe. Rubbers. Public Record Office. Judges. C. 13127
Her Majestys State Paper Office. Public Record Office. No. 4. Anonymous warning of Gunpowder Plot
Public Record Office. Sign Manual of Queen Elizabeth. Crown. P. R. O. Cards. No. 9
Public Record Office. Sign Manual of Queen Elizabeth on a royal warrant of 28 February. 19 Elizabeth. Crown
Great Domesday. The Larger Volume of Domesday Book. H. M. S. O. Crown. Public Record Office
Surrey. Public Record Office. New Building at Kew. Crown
Public Record Office New Building at Sunset. Judges. C 17435 X. John Critchley