| Recipients: |
| 1920 | Hugo Griebert | The Stamps of Spain 1850-1854 |
| 1921 | Sir Edward D Bacon KCVO | The Line Engraved Postage Stamps of Great Britain |
| 1922 | Charles Nissen and Bertram McGowan | The Plating of the Penny Black Postage Stamp of Great Britain, 1840 |
| 1923 | Charles Lathrop Pack | Victoria: The half-Length Portraits and the Twopence Queen Enthroned |
| 1924 | Lieut. Colonel GSF Napier | The Stamps of the First Issue of Brazil |
| 1925 | Justus Anderssen and H Dethloff | Norges Frimerker 1855-1924 |
| 1927 | FJ Peplow | The Postage Stamps of Buenos Aires |
| 1928 | CF Dendy Marshall | The British Post Office from its Beginning to the End of 1925 |
| 1929 | AM Tracey Woodward | The Postage Stamps of Japan and Dependencies |
| 1930 | Dr Carroll Chase | The 3c Stamp of the United States 1851-57 Issue |
| 1931 | Gilbert J Allis | Cape of Good Hope: Its Postal History and Postage Stamps |
| 1932 | EA Smythies and Captain DR Martin | The Four Annas Lithographed Stamps of India, 1854-55 |
| 1933 | EJ Lee | The Postage Stamps of Uruguay |
| 1934 | Dr Emilio Diena | I Francbolli del Regno di Napoli |
| 1935 | Carl Schmidt | Die Postwertzeichen der Russischen Landschaftsaemter |
| 1936 | Dr Herbert Munk | Kohl-Briefmarken-Handbuch |
| 1937 | Stanley B Ashbrook | The United States Ten Cent Stamp of 1851-57 |
| 1938 | Max G Johl | United States Stamps of the 20th Century, Vol IV |
| 1939 | Dr H Osborne | Great Britain, Twopence Plate Nine. A Study of the Plate and its Repairs |
| 1940 | JH Curle and AE Basden | Transvaal Postage Stamps |
| 1944 | AA Jurgens | The Handstruck Letter Stamps of the Cape of Good Hope from 1792 to 1853 and the Postmarks from 1853 to 1910 |
| 1945 | Prescott H Thorp | The Stamped Envelopes and Wrappers of the United States and Possessions |
| 1947 | Winthrop S Boggs | The Postage Stamps and Postal history of Canada |
| 1948 | A Tort Nicolau | Guia del Coleccionista de Sellos de Correos de España 1855-69 |
| 1949 | Dr FE Wood | Straits Settlements Postage Stamps |
| 1950 | LE Dawson | The One Anna and Two Annas Postage Stamps of India 1854-55 |
| 1951 | D Alan Stevenson | The Triangular Stamps of Cape of Good Hope |
| 1952 | J Schmidt-Andersen | The Postage Stamps of Denmark 1851-1951 |
| 1953 | Sir John Wilson Bart CVO | The Royal Philatelic Collection |
| 1954 | JRW Purves | The Half Lengths of Victoria |
| 1956 | The Royal Philatelic Society of New Zealand | The Postage Stamps of New Zealand Vol III |
| 1958 | John Easton | The De La Rue History of British and Foreign Postage Stamps 1855-1901 |
| 1959 | R Forrester-Wood | The Stamps and Postal History of Sarawak |
| 1960 | SD Tchlinghirian and WSE Stephen | Stamps of the Russian Empire Used Abroad (Published in Six Parts) |
| 1961 | Dr Mohamed Dadkhah | The Lion Stamps of Persia |
| 1962 | Nicholas Argenti | The Postage Stamps of New Brunswick and Nova Scotia |
| 1963 | Dr WRD Wiggins | The Postage Stamps of Great Britain Part II |
| 1964 | Dr Joseph Schatzkés | The Cancellations of Mexico 1856-74 |
| 1965 | Joaquín Galvez Naranjo | Los Primeros Sellos de Chile 1853 a 1867 |
| 1966 | Dr S Ichida | The Cherry Blossom Issues of Japan 1872-1876 |
| 1967 | The Federation of Hungarian Philatelic Societies | A Magyar Belyagek Monografiaja Vols I, II and V |
| 1969 | International Society of Guatemala Collectors | Guatemala Volume I Postal History and Stamps to Mid 1902 |
| 1972 | George E Hargest | History of Letter Post Communication between the United States and Europe, 1845-1875 |
| 1973 | Raymond Salles | Encyclopaedie de la Poste Maritime Française Historique et Catalogue (Vols I-VIII) |
| 1974 | Robson Lowe | Encyclopaedia of British Empire Postage Stamps (Volume V) |
| 1975 | GC van Balen Blanken and Bert Buurman | The Netherlands - Plating of the 1852 5 cent and 10 cent Values |
| 1976 | Archibald GM Batten | The Orange Free State - its Postal Offices and their Markings 1868-1910 |
| 1978 | A Ronald Butler | The Departmental Stamps of South Australia |
| 1979 | Örjan Lüning | Luftpostens Historia Norden (The History of Airmail in Scandinavia) |
| 1980 | Harold W Fisher | The Plating of the Penny (Volumes I-IV) |
| 1981 | Marcus Samuel and Dr Alan K Huggins | Specimen Stamps and Stationery of Great Britain |
| 1982 | Sigurd Ringström and Henry E Tester | The Private Ship Letter Stamps of the World (Parts I and II) |
| 1983 | Dr Anton Jerger | Handbooks on Austrian Lombardy-Venetia |
| 1984 | Armando Mario O Vieira | Selos Classicos de Relevo de Portugal |
| 1985 | Paolo Vollmeier | Storia Postale del Regno di Sardegna dalle Origini all'Introduzione del Francobollo |
| 1986 | Professor Carl-Richard Brühl | Geschichte der Philatelie (Volumes I and II) |
| 1988 | Gary S Ryan | The Cancellations of Hungarian Post Offices on the First Issue of Hungary 1867-1871 |
| 1989 | Adolph Koeppel and Raymond D Manners | The Court Fee and Revenue Stamps of the Princely States of India (Volumes I and II) |
| 1990 | Dott Niño Aquila | I Francobolli Degli Ultimi Re |
| 1991 | Peter M Ibbotson | The Postal History and Stamps of Mauritius |
| 1992 | J Michael and P Jane Moubray | British Letter Mail to Overseas Destinations 1840-1875 |
| 1993 | Jack F Ince and S John Sacher | The Postal Services of the British Nigeria Region |
| 1994 | James van der Linden | Catalogue des Marques de Passage |
| 1995 | HE Walker and JH Coles | Postal Cancellations of the Ottoman Empire (Parts 1-4) |
| 1996 | Paolo Vollmeier and Vittorio Mancini | Storia Postale del Regno di Napoli dalle Origini all'Introdzione del Francobollo |
| 1997 | Peter E Fernbank | King George V Key Plates of the Imperium Postage and Revenue Design |
| 1998 | Hugh V Feldman | Letter Receivers of London 1652-1857 |
| 1999 | Professor Peter AS Smith | Egypt - Stamps and Postal History - A Philatelic Treatise |
| 2000 | G Clive Akerman and Gavin H Fryer | The Reform of the Post Office in the Victorian Era and Its Impact on Economic and Social Activity |
| 2001 | Dr Ulrich Ferchenbauer | Österreich 1850-1918 |