MacTutor
Recently added stamps
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 guericke4 Germany 1936 |  nightingale25 Belgium 1939 |  mutis4 Colombia 1947 |  lomonsov8 Romania 1947 |
 lomonsov6 Soviet Union 1947 |  lomonsov7 Soviet Union 1947 |  eotvos3 Hungary 1948 |  nightingale24 Costa Rica 1949 |
 escher2 Netherlands 1949 |  escher3 Netherlands 1949 |  planck15 German Democratic Republic 1950 |  gaylussac1 France 1951 |
 carnot_sadi1 France 1954 |  nightingale27 Turkey 1954 |  nightingale12 Australia 1955 |  nightingale31 Germany 1955 |
 planck13 German Democratic Republic 1958 |  planck18 German Democratic Republic 1958 |  eotvos4 Hungary 1959 |  nightingale8 Dominica 1968 |
 raphael12 Yemen 1968 |  herschel7 Great Britain 1970 |  brahe18 Ajman 1971 |  copernicus135 Liberia 1973 |
 nightingale20 Surinam 1973 |  ampere14 Djibouti 1975 |  ampere13 Republic of the Congo 1975 |  nightingale13 Seychelles 1975 |
 guericke2 German Democratic Republic 1977 |  gauss13 Germany 1977 |  aristotle25 Mali 1978 |  secchi2 Valican City 1978 |
 secchi4 Valican City 1978 |  secchi5 Valican City 1978 |  einstein39 Soviet Union 1979 |  nightingale16 Antigua and Barbuda 1981 |
 nightingale30 Dominica 1982 |  dodgson3 Mali 1982 |  dodgson4 Mali 1982 |  broglie5 Sweden 1982 |
 herschel_william14 Paraguay 1984 |  karman9 Central African Republic 1985 |  hevelius4 Anguilla 1986 |  herschel_william12 Ivory Coast 1986 |
 watt10 Mali 1986 |  watt8 Wallis and Futuna 1986 |  boyle5 Granada 1987 |  watt3 Grenada 1987 |
 watt9 Grenada 1987 |  abbe2 German Democratic Republic 1989 |  nightingal10 Hungary 1989 |  mazur1 Poland 1989 |
 aristotle24 Greece 1992 |  lobachevsky3 Russia 1992 |  arch14 Turks and Caicos Islands 1992 |  karman3 USA 1992 |
 watt12 Antigua 1993 |  la_condamine1 Ecuador 1993 |  la_condamine2 Ecuador 1993 |  la_condamine3 Ecuador 1993 |
 von_neumann6 Guyana 1993 |  faraday9 Madagascar 1993 |  karman7 Central African Republic 1994 |  foucault2 France 1994 |
 bethe2 Gabon 1995 |  bethe3 Grenada 1995 |  broglie4 Maldives 1995 |  barkla3 Togo 1995 |
 landau_lev10 Uganda 1995 |  lomonsov10 Cuba 1996 |  heisenberg8 Nicaragua 1996 |  fermi8 Tanzania 1996 |
 karman8 Chad 1997 |  hubble5 Palau 1998 |  karman6 Mali 1999 |  watt4 Maldives 2000 |
 descartes15 Sierra Leone 2000 |  olympiad_2000 South Korea 2000 |  nightingale26 Uganda 2000 |  schmidt_otto4 Belarus 2001 |
 fermi9 Monaco 2001 |  watt5 Sierra Leone 2001 |  tinbergen4 Dominica 2002 |  lorenz_hendrik4 Grenada 2002 |
 lorentz_hendrik3 Guinea 2002 |  franklin_benjamin15 USA 2006 |  franklin_benjamin16 USA 2006 |  franklin_benjamin17 USA 2006 |
 abdullayev2 Azerbaijan 2008 |  landau_lev11 Azerbaijan 2008 |  planck16 Germany 2008 |  eddington3 Guinea 2008 |
 herschel_william13 Guinea 2008 |  chandrasekhar4 Guinea 2008 |  chandrasekhar5 Guinea 2008 |  watt6 Sao Tome and Principe 2008 |
 faraday11 Guinea-Bissau 2009 |  zuse3 Guinea-Bissau 2009 |  feynman4 Sao Tome and Principe 2009 |  xu_guangqi4 Vatican City 2009 |
 nightingale29 Alderney 2010 |  nightingale17 Liberia 2010 |  herschel_william11 Marshall Islands 2010 |  boscovich17 Bosnia and Herzegovina 2011 |
 nightingale9 Jersey 2011 |  chandrasekhar6 Tuvalu 2011 |  fraunhofer1 Germany 2012 |  weber1 Germany 2012 |
 francesca2 Guinea 2012 |  faraday7 Marshall Islands 2012 |  watt7 Marshall Islands 2012 |  fessenden2 Granada 2013 |
 hertz_heinrich12 Grenada 2013 |  bohr_niels13 Mozambique 2013 |  bohr_niels11 Mongolia 2014 |  al_haytham5 Maldives 2015 |
 huygens18 Netherlands 2015 |  ramanujan4 India 2016 |  llull2 Spain 2016 |  quetelet2 Belgium 2017 |
 hawking8 Chad 2017 |  faraday10 Macedonia 2017 |  dirac6 Sierra Leone 2017 |  hawking7 Sierra Leone 2017 |
 al_farabi14 Tajikistan 2017 |  omar9 Iran 2018 |  secchi6 Italy 2018 |  planck14 Maldives 2018 |
 planck17 Maldives 2018 |  landau_lev9 Republic of the Congo 2018 |  haret2 Romania 2018 |  weizmann Israel 2019 |
 celsius3 Macedonia 2019 |  watt11 Mozambique 2019 |  watt13 Togo 2019 |  nightingale15 Bosnia and Herzegovina 2020 |
 nightingale28 Cyprus 2020 |  penrose2 Djibouti 2020 |  nightingale22 Gibralter 2020 |  ampere12 Macedonia 2020 |
 nightingale21 Macedonia 2020 |  nightingale14 Moldova 2020 |  blaue2 Netherlands 2020 |  ortelius2 Netherlands 2020 |
 nightingale19 Portugal 2020 |  euler19 Russia 2020 |  kovalevskaya4 Russia 2020 |  nightingale11 Sierra Leone 2020 |
 bohr_niels12 Togo 2020 |  nightingale23 UNO 2020 |  nightingale18 Uraguay 2020 |  euwe10 Central African Republic 2021 |
 euwe4 Central African Republic 2021 |  lomonsov9 Central African Republic 2021 |  lomonsov3 Djibouti 2021 |  lomonsov4 Djibouti 2021 |
 lomonsov5 Djibouti 2021 |  faraday8 Great Britain 2021 |  watt14 Great Britain 2021 |  euwe5 Guinea 2021 |
 euwe6 Guinea 2021 |  euwe7 Guinea 2021 |  euwe8 Guinea 2021 |  descartes14 Macedonia 2021 |
 euwe9 Mozambique 2021 |  fibonacci5 Slovenia 2021 |  wittgenstein4 Austria 2022 |  newton98 France 2022 |
 newton99 France 2022 |  newton100 France 2022 |  newton101 France 2022 |  hawking6 Guinea 2022 |
 compte5 Bosnia and Herzegovina 2023 |  copernicus136 Bosnia and Herzegovina 2023 |  pascal14 Bosnia and Herzegovina 2023 |  pascal13 Czech Republic 2023 |
 papin2 France 2023 |  pascal12 France 2023 |  schick2 Germany 2023 |  pascal17 Macedonia 2023 |
 pascal16 Monaco 2023 |  pascal15 Portugal 2023 |  fibonacci4 Serbia 2023 |  juan2 Sovereign Military Order of Malta 2023 |
 nightingale7 Spain 2023 |  al_biruni15 Uzbekistan 2023 |  al_biruni16 Uzbekistan 2023 |  al_biruni17 Uzbekistan 2023 |
 al_biruni18 Uzbekistan 2023 |