Australia 50 cents
Canada 10 cents
USA 10 dollars Library of Congress
USA 25 cents Weir Farm National Historic Site Connecticut
Germany 3 reichsmark Flight of the Graf Zeppelin
Germany 5½ euro Naposta 1997 - Stuttgart
Andorra
Australia
Austria
Belgium
Canada
China
Cyprus
Germany
Spain
Estonia
Finland
France
United Kingdom
Greece
Croatia
Ireland
Italy
Japan
Lithuania
Luxembourg
Latvia
Monaco
Malta
Netherlands
Portugal
San Marino
Slovakia
Slovenia
United States
Vatican City
